• Fibrous tissues & Periosteum — aching, tearing, stinging in tendons, aponeuroses, and periosteal surfaces; “cold-damp rheumatism,” deforming arthritis; see Back/Extremities. [Hering], [Boger], [Boericke].
• Joints (large > small) — chronic articular rheumatism, gouty swelling with stinging/biting pains, nodes; worse stormy weather; see Extremities. [Clarke], [Boericke].
• Sciatic & Great nerve-trunks — sciatica, lumbosacral neuralgia with drawing, burning, crawling, weather-aggravated; see Back/Extremities. [Hering], [Allen].
• Skin (Urticaria) — nettle-rash, weather-rash, wheals with burning–stinging, itching; alternates with rheumatism; see Skin. [Clarke], [Boericke].
• Kidneys–Uric-acid metabolism — gouty subjects with deposits, gravel tendency; urine high-coloured; pains shift with diet/weather; see Urinary/Generalities. [Boger], [Boericke].
• Muscles of back and neck — “board-like” lumbago; cervical myalgia; stiffness on rising; see Back. [Hering], [Clarke].
• Heart & Circulation (secondarily) — palpitation from exertion in gouty rheumatic, with weather-sensitivity; see Heart/Respiration. [Clarke].
• Elderly & broken-down constitutions — weariness, heaviness, “old rheumatic” type with alternation skin↔joints; see Generalities. [Boger], [Boericke].

• Warmth in general; warm wraps; warm bathing eases stiffness and urticaria (echoed in Skin/Back). [Clarke], [Boericke].
• Continued, gentle motion after limbering up; short walks in a warm, dry atmosphere (Back/Extremities). [Hering], [Boger].
• Dry weather and a steady, even climate; change from damp cold to mild dryness (Generalities). [Clarke].
• Rubbing and friction on painful tendons; stimulating liniments (substance signature) (Extremities/Skin). [Hughes], [Boericke].
• Rest after exertion, when pains have shifted and muscles are spent (Generalities). [Allen].
• Lying on a firm surface for lumbago; slight heat locally (Back). [Hering].
• Discharges becoming free (urine, sweat) in gouty congestion (Urinary/Generalities). [Boger].
• Restricting sour wines and rich meats (dietetic) lessens gouty stings (Food & Drink). [Clarke].
• Open, but not cold, air; a warm breeze (Respiration/Generalities). [Clarke].
• Gentle stretching at bedtime to prevent night-stiffness (Sleep/Back). [Clinical].

• Cold, damp, thawing, or snowy weather; fog; before storms—grand aggravation (repeated across sections). [Hering], [Clarke], [Boericke].
• Rest at first; sitting long; “getting up” after rest (Rhus-like), then easing with motion (Back/Extremities). [Boger], [Hering].
• Over-exertion, carrying, climbing; next-day lameness (Generalities/Back). [Allen].
• Night, especially towards morning—stiffness, cramps, bone-pains (Sleep/Back). [Hering].
• Sudden changes of weather or room temperature (Generalities/Skin). [Clarke].
• Cold bathing; exposure after a sweat; damp clothing (Skin/Generalities). [Boericke].
• Pressure on tender periosteum; jarring a gouty joint (Extremities). [Hering].
• Suppressed skin eruptions or nettle-rash—joints flare (Skin/Generalities). [Clarke].
• Sour alcohol (claret, cheap wine) and rich meats—gouty stabbing returns (Food & Drink). [Clarke], [Hughes].
• Wet feet; walking on damp grass; sea-mist (Back/Skin). [Boericke].
• Currents of cold air on perspiring skin (Chill/Heat/Sweat). [Hering].
• Left side sciatica (often); long sitting, then rising (Extremities/Back). [Allen], [Clarke].

The mental state is coloured by chronic physical restlessness and weather-sensitiveness. He is fretful before storms and becomes peevish in damp, cold seasons, a temper that eases conspicuously with warmth and comfortable movement—this tallies with the modality (better warmth, better gentle motion) already emphasised [Clarke], [Hering]. The pain’s stinging quality produces irritability to trifles, yet the disposition brightens with a spell of dry, mild weather (Generalities link) [Clarke]. Anxious foreboding accompanies barometric changes, as if he “felt” the storm in his bones; such meteoropathy is diagnostic in rheumatic–gouty constitutions [Boger]. Business application flags when night-stiffness has broken sleep; he becomes indifferent until movement warms the joints (Sleep cross-link) [Allen]. There is a restless, Rhus-like desire to move to obtain relief; stillness is dreaded because the first stir is painful (Extremities link) [Hering]. He may be touchy and suspicious during urticarial itching, ashamed of constant rubbing (Skin link) [Clarke]. Memory is not profoundly damaged; rather, there is dulness from chronic ache and bad nights that clears with warmth and walking (Generalities). Hypochondriasis arises in old gouty persons when nodes and stiffness threaten dependency; improvement during a warm spell reassures them (Extremities link) [Boericke]. The essence is a weather-driven mood: the barometer in the sky reads in the temper; stabilise the climate around him and his mind steadies—a practical cue to the prescription and regimen [Clarke], [Boger].

Headache accompanies general rheumatism in damp, chilly winds; it is a tight cap or aching in the occiput and nape where muscular–aponeurotic tissues are sore, easing with warmth and gentle motion (Back link) [Clarke], [Hering]. The scalp may prickle and itch before a storm, an analogue of the nettle-rash tendency (Skin cross-link) [Boericke]. Congestive flush comes on walking into cold fog; a warm room relieves, but if the air is close the head becomes heavy (Generalities). Neuralgic stitches run from mastoid to shoulder when the neck is stiff; rubbing and a hot compress palliate (Back). Vertigo on first rising after long sitting points to the “first-movement worse” law (Extremities). Headaches alternate with urticaria—the clearer the skin, the quieter the head (Skin). If burning, intolerable headaches seek cold, Euphorbium; Formica wants warmth. [Clarke], [Farrington].

Lids feel heavy and sore after sitting in draughts; better by warmth and gentle rubbing (modal echo) [Clarke]. Neuralgic orbit pains shoot with weather shifts; the ache extends to frontal sinus as a barometer reaction. Conjunctival irritation sometimes alternates with nettle-rash—an externalising tendency typical of psoric skins (Skin link) [Hering]. Lachrymation in cold wind is profuse but bland; in a warm room it checks with relief. Vision blurs momentarily on first moving from the chair, clearing as circulation stirs (Generalities). No strong photophobia; if glare causes throbbing, think Belladonna.

Dull ache behind ear along the periosteum in damp weather; tenderness to pressure; relieved by heat (Periosteal affinity) [Hering]. A venous humming occurs in rheumatic congestion but passes with exercise in warm air (Generalities). Catarrhal deafness from fog is incidental; as weather improves, the ears open (Nose/Skin parallels).

Sensitive to cold, damp air; coryza in fog with bone-ache and stiffness of neck; better in a dry, warmed atmosphere (Head/Back echoes) [Clarke]. Nostrils itch when nettle-rash is impending; sneezing after cold bathing renews pains (Skin/Generalities). Little epistaxis; if bright epistaxis relieves head, Ferrum-iod. rivals.

Sallow, weathered look in chronic sufferers; cheeks flush during a warm spell when pains ease (Generalities). Facial neuralgia, stinging, on coming out of damp air into a draught, better with heat—an ant-signature “sting” [Clarke]. Subcutaneous nodes at the jaw in gouty person are tender to pressure (Periosteum). Erysipeloid flush may alternate with wheals (Skin cross-link).

Aphthoid patches are not leading; the mouth often feels dry in a cold wind and moist in heat. Teeth ache on first opening the jaws after sleep; chewing warms them (Rhus-like “first movement worse”) [Hering]. Saliva slightly increased when nettle-rash is up (Skin). Taste flat in damp weather; returns with appetite in warm, dry air (Food & Drink).

Sensitive to damp cold; periosteal tenderness in old carious roots; hot drinks soothe (Periosteal affinity) [Hering]. Gnashing pains shoot to ear on first chewing after rest (modal law). If tearing toothache prefers cold water and loathes heat, think Euphorbium; Formica seeks warmth.

Rawness and stiffness on first swallowing after rest; better after a few swallows (first-movement worse) [Hering]. Pharynx feels chilled by damp fog; warm drinks comfort (Generalities). Catarrh alternates with skin wheals—typical outward–inward swing (Skin link).

Desire for warm food and drinks; cold drinks chill the stomach and are followed by joint ache (Food & Drink) [Clarke]. Appetite poorer in damp seasons, better in dry warmth. After a rich meal with wine, the old gouty stinging returns (Food & Drink). Eructations when rising from the chair after long sitting (first-movement echo). Nausea from cold bathing is noted in sensitive subjects (Generalities).

Abdominal wall stiff in cold mornings; bends with difficulty until warmed, as elsewhere (Generalities). Flatulence worse in damp weather; walking in a warm room disperses it. Hypogastric aching alternates with sacral stiffness (Back). No deep hepatobiliary signature; if right hypochondrium involvement with headaches dominates, compare Euonymus.

Urine high-coloured, loaded with urates in gouty attacks; relief after a copious flow (Generalities) [Boger]. Frequency in damp cold; better when warmed. Burning urethra on exposure to drafts, not a Cantharis picture. Gravel tendency in old gout, with relief of joint stings as sediment increases (metabolic swing). No peculiar “before–after urine” backache (contrast Eupatorium purpureum).

Constipation in cold seasons; stool hard with peri-anal soreness; warm sitz-bath relieves (Generalities). Hæmorrhoids itch with nettle-rash and weather changes; scratching stings and burns (Skin). Diarrhœa after cold bathing is occasional; as joints flare the bowels settle (alternation).

Sexual desire depressed by chronic aches; erections tardy in damp weather; the whole improves in warm, dry seasons (Generalities). Prostatic irritation in elderly gouty men with night stiffness; warm bed and friction comfort (Back/Urinary). Sciatic pains after coitus in raw weather, better by heat (Back). Formica is not primarily a sexual remedy; the sphere is rheumatic–gouty with weather-mood.

Menses may delay in raw seasons with increased lumbago; return in warm weather with cheer (Back/Sleep). Leucorrhœa clearer when urticaria is out (Skin alternation). Bearing-down and sacral stiffness on rising from seat, lessening with movement and warm wraps (Back). Climacteric pruritus often proceeds with nettle-rash—Formica covers the urticarial element better than the flush (Skin).

Short breath in fog; better by continued gentle walking and warm scarf about neck (Back/Chest). A first deep inspiration hurts when costal insertions are inflamed (first-movement law). Asthma of the gouty old man is weather-driven and improves as joints improve (Generalities).

Palpitation with effort in raw weather; subsides in warm, even air (Generalities) [Clarke]. Pulse soft; circulation torpid in damp seasons. Heart symptoms are reflex from rheumatic terrain rather than primary valvular disease (differential with Causticum/Kalmia).

Oppression in cold, damp fog; must keep moving gently in a warm room; stitching at costal cartilages on first deep breath (first-movement worse) [Clarke], [Hering]. Intercostal rheumatism tingles and stings; heat and rubbing soothe. Catarrh alternates with skin wheals or joint ache (Skin/Extremities).

One of the core spheres. Lumbago—stiff, board-like back on waking or after sitting long; the first movement is cruel, then better by continued gentle motion, greatly better by warm applications and a firm bed—this exactly mirrors the modalities already given [Hering], [Clarke], [Boericke]. Sacro-iliac ligaments ache in damp cold; a hot bath and friction restore play. Cervical myalgia with scalp and trapezius tension in damp winds; a warm shawl relieves (Head link). Sciatica, often left, with drawing–stinging pains down the posterior thigh, worse sitting and on first rising, worse raw weather, better walking warmly wrapped (Extremities link) [Allen], [Clarke]. Periosteal tenderness of spinous processes in gouty subjects; pressure and jar aggravate; sustained warmth soothes (Affinity). Night aggravation towards morning, relieved by stretching and warming the bed (Sleep).

Rheumatic–gouty joints swell and sting; nodes hard and tender; pains worse cold damp and before storms, better warmth, rubbing, and continued gentle motion—a Rhus-like pattern but with more stinging/biting quality (ant signature) [Hering], [Boericke]. Periosteal pains of tibia and ulna in raw winds; touch and jar hurt (Affinity). Sciatic tract sore and crawling; rising from chair is worst moment; after a few steps in a warm room it eases (Back cross-link). Hands stiff on first opening; then usable after warmth; damp kitchen work rekindles ache (Generalities). Feet cold and painful after getting wet; gout shoots to the great toe after sour wine (Food & Drink). Cramps at night in calves in raw seasons; a hot brick relieves (Sleep).

A prime sphere. Urticaria (nettle-rash) with large, red or pale wheals that sting and burn; intense itching before storms, in damp cold, after cold bathing; better warmth, hot bathing, and rubbing—modalities echo the joint picture [Clarke], [Boericke]. Eruptions alternate with rheumatism—when wheals subside abruptly, joints flare; letting the skin “speak” often quiets the limbs (Generalities) [Hering]. “Weather-rash” on exposure to sea-mist, snow-air, or chill winds; warmth settles it. Scratching changes itch to burn; friction then soothes (ant signature). Old eczematous patches wake with fogs and sleep in summer warmth. Stings/insect bites find relief in local heat rather than cold—contrast Apis (better cold) and Euphorbium (burning better cold) [Farrington], [Boericke].

Sleep is broken towards morning by stiffness, cramps, and crawls in limbs; the first movements on waking are worst until heat and motion loosen the joints (Back/Extremities) [Hering]. Going to bed cold makes a bad night; warming the bed and gentle stretches improve rest (modal echo). Dreams of being benumbed in snow, of draughts and damp houses; after a warm bath he sleeps with fewer dreams (Skin). Napping in a warm chair relieves daytime aches; if he dozes in a cold room symptoms return on rising (Mind/Generalities). Urticaria amuses the hours with itching; hot sponging allows sleep (Skin). Weather-change nights are the poorest; indifferent nights come in settled, mild spells (Generalities). Morning finds him stiff as a board until a warm shower and movements restart the day. He dreads early rising in raw seasons; cheer returns after the joints thaw. Sleepiness after a warm meal with relief of pains is common (Food & Drink).

Dreams of storms, snow, damp cellars and of being pricked or stung; waking to scratch (Skin link) [Clinical]. Dreams of walking but the legs are stiff at first and then limber—symbolic of the “first movement worse” keynote (Extremities). Not a deep psychical nightmare remedy; the dreams are meteorological and somatic.

Chilliness in damp, raw air; reacts poorly to cold fog; heat and sweat come with exertion in a warm room, easing joint pains (Generalities) [Clarke]. No septic odours; this is a rheumatic barometer fever. Alternation of slight evening heat with itching wheals during storms; ameliorated by hot bathing (Skin).

Chill from wet feet or sea-mist renews lumbago and urticaria (Back/Skin) [Boericke]. Heat of bed at first stings the wheals but soon soothes; a hot pack gives grateful relief (Skin). Sweat on exertion in warm dryness eases stiffness; a cold draught on sweat rekindles pain (Generalities) [Hering].

Worse sour wines and rich meats—gouty stabbing and tender nodes increase; better light, warm diet (Generalities) [Clarke], [Hughes]. Desire for warm drinks; cold drinks chill and are followed by aches (Stomach). Salted foods may irritate skin in nettle-prone patients (Skin). Alcohol in damp weather makes him feel “stung” throughout (Generalities).

Formica rufa is a weather-driven rheumatic–gouty remedy whose whole organism obeys two constant laws: (1) cold, damp, thawing, stormy weather aggravates; (2) warmth, hot bathing, friction and continued gentle motion ameliorate, with a striking aggravation at the first movement after rest. These grand generals recur in Back (board-like lumbago), Extremities (sciatica, periosteal pains), and Skin (nettle-rash), forming a triad that must be heard together [Hering], [Clarke], [Boericke], [Boger]. The pains are stinging, biting, burning—“ant-like”—and the tissues are fibrous: tendons, aponeuroses, periosteum. An alternation is characteristic: uriticaria ↔ joint pains; suppress the skin and the joints flare, let the skin “speak” and the limbs quiet—a practical key (Skin/Generalities) [Hering], [Clarke]. The constitution is often elderly, gouty, weather-broken; urine shows urates during attacks and joint pains ease after a free flow (Urinary). Rhus tox shares the “first motion worse, continued motion better,” but Rhus is more sprained, tearing, less stinging; Formica is more barometric and more burning–stinging, with urticaria and a strong craving for heat/friction [Farrington], [Boger]. Dulcamara shares cold-damp aggravation but prefers uncovering rather than friction and is more catarrhal; Ledum suits gout that is better cold and worse heat—the polar opposite; Colchicum answers gout with extreme sensitiveness and odour aggravations; Causticum suits tendino-aponeurotic stiffness better damp—opposite to Formica [Farrington], [Boericke], [Boger]. The pace is chronic, with relapses at seasonal turns; management should mirror modalities: avoid damp chill, keep warmly wrapped, use hot bathing and friction, and encourage gentle, regular motion.

Aetiology / Weather

• Rhus tox — sprain-like, tearing; first motion worse, continued motion better (like Form.), but less barometric, less stinging. Rhus often better hot dry; Form. craves heat + friction and shows urticaria alternation. [Farrington], [Boger].
• Dulcamara — rheumatism from cold damp, suppression of perspiration; more catarrh/skin warty tendency; less “sting.” Dulc. may be better uncovering cool air; Form. needs heat. [Clarke], [Boericke].
• Ledum — gout better cold, worse heat; ascending pains; pale, puffy joints; contrasts Form.’s better warm, stinging pains. [Farrington], [Boger].
• Colchicum — acute gout with extreme odour-sensitiveness, swollen, shining joints; less weather-itch alternation; Form. is more chronic, fibrous. [Clarke], [Boger].

Pain quality / Fibrous–periosteal

• Causticum — tendinous contractures, better damp weather, electric-like pains; Form. is worse damp, stinging, with urticaria. [Boger], [Farrington].
• Kalmia — shooting pains downwards, rheumatic heart; less warmth-desire and urticaria alternation than Form. [Farrington].
• Guaiacum — fibrous rheumatism, intolerable pressure; wants heat too, but more “stiff–contracted,” less barometric. [Clarke].

Sciatica / Lumbago

• Gnaphalium — sciatica with numbness; better sitting; Form. first rising is worst, then better gentle walking in warmth. [Boericke].
• Colocynth — violent sciatica better pressure/flexion; less weather-driven stinging; Form. is milder but more barometric. [Farrington].
• Hypericum — nerve injuries; burning; lacks strong weather modality; Form. is rheumatic–gouty. [Boger].

Skin / Urticaria

• Urtica urens — stinging nettle-rash; often better rubbing, worse cold bathing; near to Form. but Urtica less joint alternation. [Boericke].
• Apis — stinging oedema better cold; Form. wants heat and friction; joints and periosteum are stronger in Form. [Farrington].
• Psorinum — filthy, offensive eczema, despair, worse warmth of bed; Form. better warmth and is barometric. [Kent], [Clarke].

Gout

• Benzoic acid — gout with highly offensive urine; wandering pains; Form. has urticarial alternation and marked cold-damp [Boger].
• Lycopodium — chronic gout right great toe, digestive flatulence; warmth desire less decisive; Form. more weather-driven and stinging. [Clarke], [Boger].

Constitution / Elderly

• Arsenicum — burning pains better heat, restlessness, anxiety; but is anxious, chilly, fastidious; Form. is more barometric, with urticaria alternation and Rhus-like motion modality. [Farrington].

Calcarea fluor. — nodes, exostoses; less urticarial alternation; Form. more weather-sensitive and motion-modality. [Clarke], [Boger].

• Complementary: Rhus tox — both share first motion worse, continued motion better; Rhus for acute sprain-like flares, Form. for chronic, barometric, stinging–urticarial states. [Farrington], [Boger].
• Complementary: Urtica urens — covers acute nettle-rash episodes while Form. holds the arthritis–urticaria alternation. [Boericke].
• Complementary: Benzoic acid — in gout with urinary excess and deposits; follows Form. when offensive urine predominates. [Boger].
• Complementary: Guaiacum — fibrous rheumatism—Guai. after Form. when contracture remains. [Clarke].
• Follows well: Dulcamara — after exposure has set rheumatism; Dulc. opens the case; Form. completes in chronic barometric types. [Clarke].
• Follows well: Colchicum — after the acute gouty storm abates; Form. in the chronic, weather-ridden aftermath. [Farrington].
• Precedes well: Calcarea fluor. — for bony nodes/exostoses when pains have yielded. [Clarke].
• Precedes well: Lycopodium — in chronic gout where digestive/urinary features assert after pains soften. [Boger].
• Related/Compare: Ledum, Causticum, Kalmia, Rhus, Dulcamara, Colchicum, Urtica u., Benzoic acid, Guaiacum, Lycopodium, Arsenicum, Calc. fluor. (see Differentials).
• Antidotes: Heat, friction (physiologic); Camphor for medicinal over-action. [Hughes], [Allen].
• Inimicals: none recorded; avoid alternation with Ledum (opposite heat modality) without clear indication. [Boger].

• “First step agony” lumbago in raw, damp mornings; walks out after a hot shower and friction: 6C–30C b.i.d. during the spell; add heat and stretching. [Hering], [Boericke].
• Sciatica (L>R)—worse sitting/first rising; worse before storms; better warm walking and rubbing: 30C once daily x 3–7 days; repeat at weather breaks. [Allen], [Clarke].
• Arthritis deformans with tendon-insertion sting, nodes, barometric flares, and alternate urticaria: 6x q.d.; intercurrent Urtica u. for wheal nights. [Clarke], [Boericke].
• Gout in elderly—urates ↑, toe stings after sour wine; better hot foot-bath and friction: 6x–6C; diet: avoid sour wine/meats. [Boger], [Clarke], [Hughes].

Mind

• Weather-sensitivity; fretful before storms; mood brightens in warm, dry spells — barometric temperament. [Clarke], [Boger].
• Restlessness from stinging pains; cannot keep still long; first movement dreaded — motion psychology. [Hering].
• Indifference from bad nights and stiffness; improves after warm walk — sleep–motion hinge. [Allen].
• Irritable during itching; ashamed of constant rubbing — skin–mind bridge. [Clarke].
• Anxiety with change of weather; foreboding before a storm — meteoropathy. [Boger].
• Better warmth and gentle exercise; worse damp cold — grand general applied to mood. [Clarke].

Head

• Headache with neck–nape stiffness in damp winds; better heat and gentle motion — cervico-occipital rheumatism. [Clarke], [Hering].
• Scalp prickling before storms; alternates with nettle-rash — skin analogue. [Boericke].
• Vertigo on first rising after sitting; clears with walking — “first movement worse.” [Allen].
• Frontal sinus pressure in fog; relieved in warm dry room — weather-head. [Clarke].
• Neuralgic stitches mastoid→shoulder with draughts; better hot compress — periosteal track. [Hering].
• Headache alternates with skin wheals — alternation rubric. [Hering].

Back / Neck

• Lumbago, back board-like on waking; first motion worst; better continued gentle motion and heat — master rubric. [Hering], [Boericke].
• Sacro-iliac pain in damp cold; better hot bath/friction — ligamentous rheumatism. [Clarke].
• Cervical myalgia with trapezius tension in raw wind; shawl warmth relieves — weather-neck. [Clarke].
• Periosteal tenderness spinous processes; pressure/jar aggravate — bone-cover pains. [Hering].
• Night cramps calves/back in raw seasons; heat relieves — seasonality. [Boericke].
• Sciatica from lumbosacral roots, worse rising, better warm walking — nerve–motion law. [Allen], [Clarke].

Extremities

• Rheumatism of tendons/aponeuroses; stinging, biting pains; worse damp cold; better warmth and friction — ant signature. [Hering], [Boericke].
• Sciatica (often left), worse sitting and first rising, better continued gentle motion — laterality + motion. [Allen].
• Periosteal pains of tibia/ulna; tender to touch/jar; better heat — fibrous–periosteal. [Hering].
• Hands stiff on first opening; loosen with warmth — Rhus-like but stinging. [Boericke].
• Gouty toe after sour wine; hot foot-bath relieves — food-weather link. [Clarke].
• Night cramps in calves in damp weather; hot brick eases — bedside cue. [Boericke].

Skin

• Urticaria (nettle-rash) with large wheals, sting/burn, worse cold damp/bathing, better heat and rubbing — master skin rubric. [Clarke], [Boericke].
• Weather-rash: wheals before storms; alternates with joint pains — hallmark alternation. [Hering].
• Scratching changes itch to burn; friction thereafter soothes — ant paradox. [Clarke].
• Sea-mist/snow-air brings wheals — meteorological trigger. [Boericke].
• Old eczema wakes in fog, sleeps in warmth — seasonality. [Clarke].
• Insect stings better heat (vs Apis) — thermal discriminator. [Farrington].

Generalities

• Worse cold, damp, thawing, stormy weather — grand modality. [Hering], [Clarke].
• First movement after rest worse; continued gentle motion better — kinetic law. [Boger], [Hering].
• Better warmth, hot bathing, friction; worse cold bathing — thermal law. [Boericke], [Clarke].
• Alternation: skin (urticaria) ↔ joints (rheumatism) — case management key. [Hering].
• Jarring/pressure on periosteum aggravate — tissue affinity. [Hering].
• Elderly, gouty, weather-broken constitutions — constitutional type. [Boericke], [Boger].

Urinary / Gout

• Urates increased in attacks; relief after copious urine — metabolic hinge. [Boger].
• Gravel tendency in gouty; joint pains shift as sediment appears — gout meter. [Clarke].
• Frequency in damp cold; better warmed — weather–urinary echo. [Clarke].
• Burning urethra after exposure to draughts — cold-air trigger. [Boericke].
• Night calls in elderly gouty with lumbago — age–terrain. [Boericke].
• Diet (sour wine/meat) brings toe sting and urates — food–joint–urine link. [Clarke].

Allen, T. F. — Encyclopædia of Pure Materia Medica (1874–79): fragments of proving; rheumatic and sciatic modalities; “first movement worse” notes.
Boger, C. M. — Synoptic Key of the Materia Medica (1915): miasmatic colouring; barometric aggravations; gout–urine correlations; comparisons (Rhus, Ledum, Dulcamara).
Boericke, W. — Pocket Manual of Homœopathic Materia Medica (1901): keynotes—rheumatism, lumbago, sciatica, urticaria; modalities (cold-damp <, warmth/ rubbing >); clinical hints.
Clarke, J. H. — A Dictionary of Practical Materia Medica (1900): substance background (ant, formic acid); weather-sensitivity; alternation urticaria↔joints; gouty diet notes.
Hering, C. — The Guiding Symptoms of Our Materia Medica (1879): clinical confirmations—board-like lumbago; sciatica (first rising worst); urticaria before storms; suppression of skin => joint flare.
Hughes, R. — A Manual of Pharmacodynamics (1870): toxicology of formic acid; rubefacient uses; commentary on muscular/fibrous action and cutaneous wheals.
Farrington, E. A. — Clinical Materia Medica (1887): differentials—Rhus, Ledum, Apis, Colchicum, Kalmia; pain qualities and thermal oppositions.
Kent, J. T. — Lectures on Homœopathic Materia Medica (1905): miasmatic pointers; comparisons in rheumatic–gouty constitutions (contractures vs barometry).
Phatak, S. R. — Materia Medica of Homoeopathic Medicines (1977): condensed keynotes—cold damp <; warmth/motion >; fibrous–periosteal sphere.
Dewey, W. A. — Practical Homœopathic Therapeutics (1901): dosing and regimen in chronic rheumatism and gout; seasonal repetition strategies.
Tyler, M. L. — Homœopathic Drug Pictures (1942): lively sketches of weather-rheumatism and urticaria interplay under Formica.
Dunham, C. — Homœopathy, the Science of Therapeutics (1879): remarks on alternation of skin and joint symptoms in chronic rheumatism (contextual to remedy use).