• Liver–biliary–portal system. Fullness and soreness of right hypochondrium, bilious vomiting, icteric tint, clay/green stools, bitter taste, headache from liver (“bilious”); stitching to right scapula. See Stomach/Abdomen/Rectum/Heartburn. [Hering], [Allen], [Clarke]
• Intestinal water balance. Early-morning, gushing diarrhoea; driving from bed; worse damp/cold drinks; better dry warmth. See Rectum. [Allen], [Boger]
• Respiratory mucosa (damp asthma). Asthma in damp weather or cellars, green, profuse, ropy expectoration, rattling mornings; worse 4–5 a.m., worse seaside. See Chest/Respiration. [Clarke], [Farrington]
• Serous membranes & water retention. Hydrocephaloid states, anasarca with hepatic link, effusions after damp exposure; congestive headaches. See Fever/Generalities. [Hughes], [Boger]
• Head injury sequelae. Mental dullness, vertigo, photophobia, headache since concussion, mood lowness and irritability. See Mind/Head. [Hering], [Clarke], [Tyler]
• Joints, sacro-iliac and lumbar region. Backache worse on rising from seat or bed, stiffness in damp/fog, must move a little before it eases. See Back/Extremities. [Boger], [Allen]
• Skin & warts (sycotic). Moist, pruritic eruptions after damp, warts (especially flat, moist, hands/genitals), seborrhoeic patches aggravated by sea-air. See Skin. [Clarke], [Hering]
• Mind–mood (damp gloom). Melancholy worse cloudy/wet weather, suicidal thoughts (especially by shooting), aversion to life after injury or prolonged humidity. See Mind. [Kent], [Hering]

• Dry, warm weather; dry rooms; sunshine. [Clarke], [Hering]
• Pressure and firm bandaging over sore hypochondrium; lying on right side with knees drawn. [Allen]
• Rising and moving a little after the first painful effort (back/sacro-iliac). [Boger]
• Warm clothing, dry heat, hot drinks (for chill/diarrhoea). [Clarke]
• After free stool or copious expectoration (relieves head and chest). [Allen]
• Open windows if the air is dry (not foggy). [Farrington]
• Gentle exercise when the day is fine; avoiding cellars/basements. [Clarke]
• Regular routine, orderly meals; avoiding evening snacking. [Phatak]
• Sleep on right side (liver comfort) and thin pillow (head). [Hering]

• Dampness: rainy weather, fog, damp houses, cellars, sea-air, marshes. [Hering], [Clarke]
• Morning on first rising: back pain, stiffness, gushing stool, rattling cough. [Allen], [Boger]
• Cold drinks/ice, fruit, green vegetables, beer (bilious). [Allen], [Clarke]
• Lying on the left side (congestion), lying long in bed. [Hering]
• Pressure of tight waistbands (portal stasis), bending to tie shoes. [Boger]
• Emotions after head injury; music may aggravate gloom. [Tyler], [Kent]
• Spring and autumn change of weather; eclipses of sun (old note)—low spirits. [Clarke]
• Suppressed eruptions or perspiration by damp cold → internal congestion. [Hughes], [Hering]

Gloom deepens with the clouds. In wet or foggy weather, the Nat-s. patient becomes sad, taciturn, and irritable, brooding over self-destruction; a peculiar rubric is the impulse to shoot himself or a vision of hanging, often after head injury or during prolonged damp seasons. Aversion to life, yet duty holds; cannot bear music when the sky is grey. Morose in the morning, softens as the day dries. Oversensitive to contradiction, yet secretive about symptoms; children are cross, obstinate, worse damp weather, with greenish, slimy stools and morning cough. Distinguish from Nat-m. (reserved grief, sun-aggravation, dryness), Puls. (mild, seeks open cool air), Calc. (clammy, fearful, wants eggs; not distinctly damp-aggravated), Thuja (fixed ideas, “as if brittle”, strong sycosis but less bilious). [Hering], [Clarke], [Kent], [Tyler], [Phatak]

Bilious and weather-bound. Throbbing or pressing headaches in occiput/vertex with nausea, bitter taste, photophobia, and icteric hue about the eyes; worse damp/fog, morning, and after mental strain; better after stool or vomiting. Headache since concussion: dull, heavy, brain feels loose, worse rising, better lying still on the right side. Heaviness as if a weight is driving the skull downward; stitches to right scapula when hepatic. Compare Bry. (frontal, worse motion, wants pressure, dryness not damp-keynote), Gels. (dullness with drooping eyelids, not bilious), Nat-m. (bursting, sun-aggravation). [Hering], [Allen], [Clarke], [Boger]

Smarting and lachrymation in morning. Yellow or greenish discharge from canthi. Eyes weak and sensitive to light. Vision blurs after reading. Ailments from exposure to damp air. Conjunctivitis with thick, yellow crusts on lids. Chronic catarrh of the eyes in patients living in damp dwellings.

Roaring and humming in ears. Hearing impaired from old catarrh or suppressed gonorrhoea. Pain behind ears in damp weather. Ear discharge thick, yellow, and offensive. Worse on waking. Otitis media in children with asthma.

Coryza in damp weather with thick, green or yellow discharge. Nose blocked in the morning. Sneezing on waking. Nasal polyps in sycotic constitutions. Post-nasal drip that worsens asthma. Loss of smell with chronic catarrh.

Sallow, earthy, or blotchy complexion. Puffy under the eyes. Acne or eruptions around mouth and chin. Cold sweat on face in the morning. Neuralgia from damp exposure. Warts or greasy skin in seborrhoeic patients.

Tongue coated greenish or brown, especially at root. Mouth dry in morning. Taste bitter or metallic. Ulcers on tongue or cheeks. Cracks in corners of mouth. Excessive salivation. Speech sluggish after waking.

Toothache from damp and cold air. Gums spongy and bleed easily. Teeth feel too long. Pain worse from cold food and drinks. Sycotic dental caries. Night-time grinding in anxious or emotionally repressed patients.

Soreness and rawness in the morning. Mucus in throat difficult to hawk. Worse from cold drinks and damp air. Hawking of thick, yellow phlegm. Irritation with cough and a desire to clear throat constantly.

Bilious vomiting. Nausea in the morning, with headache. Pain in stomach worse after eating. Desire for sweet or fizzy drinks. Flatulence, with bloated abdomen. Symptoms follow grief or emotional shocks. Heartburn after sour food.

Right hypochondrium sore, liver enlarged/tender, stitches to right scapula; rumbling, fermentation; abdomen distended with wind in wet weather; portal congestion with haemorrhoids that bleed in damp. Spleen may be swollen after malarial marsh exposure. [Hering], [Clarke], [Boger]

Frequent urging, worse in damp weather. Urine greenish or dark, with sediment. Painful urging with small quantities passed. Burning at neck of bladder. Wetting the bed (enuresis) in emotional children, especially those with asthma. Worse in early morning.

Grand keynote: morning, driving-from-bed diarrhoea—gushing, watery, often brown-green, with spluttering, offensive flatus, colic, and backache; worse damp/fog, after cold drinks/fruit/beer; better warmth and dry weather. Alternation with constipation in chronic hepatic cases. Children: green, slimy stools with tenacity. Compare Aloe (urgency after eating, jelly-like), Sulph. (5 a.m. stools, burning), Pod. (profuse, painless morning stool), Nat-m. (morning but less gushing, dryness). [Allen], [Hering], [Boger], [Clarke]

Sexual desire diminished. Discharge of prostatic fluid without erection. Gonorrhoeal history with suppressed discharges and lung affections. Warts or eruptions on genitals. Testicular swelling from damp cold exposure.

Leucorrhoea greenish, acrid—worse damp, before menses; menses late, scanty or profuse if weather turns wet; post-partum depression when rains persist; milk scanty in wet spells. Asthmatic cough worse at menses in foggy weather. Compare Sep. (bearing-down, indifference), Kali-s. (yellow shifting catarrh). [Hering], [Clarke], [Farrington]

Difficult, oppressed breathing in damp, low-lying areas. Must sit up to breathe. Exertion aggravates. Breathlessness with greenish sputum. Asthma worse in morning or from weather changes. Cough with thick mucus worse on rising.

Palpitations during menses or after grief. Stitching pain near heart on inspiration. Weakness of heart in damp conditions. Heart symptoms with mental depression and suicidal thoughts.

Asthma of dampness: worse in cellars, after fog or sea-air, morning rattling, must sit up on waking, green, thick, ropy sputum; constriction across lower chest; stitches under right scapula; cough worse rising from bed and in damp changes, better dry warmth. Children wake about 4–5 a.m. with rattling, then loose after breakfast. Compare Nat-m. (dryness, sun), Puls. (evening, mild, open air better), Ars. (1–2 a.m., burning, heat relieves but more fear), Ant-t. (rattling without power to raise; damp aggravates both). [Clarke], [Boger], [Farrington], [Allen]

Lumbosacral stiffness and sacro-iliac pain worse rising from seat/bed, worse damp, better after moving a little and in dry warmth. Stitches to right scapula from liver. Compare Rhus-t. (first motion < then >, but loves damp heat; causation straining), Calc-ph. (growing pains, weather-sensitive). [Boger], [Allen], [Clarke]

Cracking in joints, worse in morning or on rising. Stiffness in knees and ankles in damp weather. Pain in left hip and thigh. Drops things from hands. Rheumatic pain worse in humid environments. Cold, sweaty feet on waking.

Eruptions greenish or yellow, often moist and excoriating. Warts, especially on hands or face, soft and oozing. Urticaria from damp or suppressed emotion. Vesicular eruptions in folds of skin. Suppressed gonorrhoea leading to skin issues.

Sleep disturbed by cough or wheezing. Wakes unrefreshed, especially between 4–6 a.m. Dreams of falling, drowning, or death. Sleep talking in anxious children. Somnambulism in emotionally burdened adolescents.

Grief-laden dreams; dreams of falling, suffocating, or being trapped. Recurring themes of loss, death, or guilt. May dream of water, drowning, or being submerged—reflecting damp aggravation and emotional heaviness.

Chill in damp and fog; heat slight, sweat sticky in wet weather; intermittent fevers of marsh dwellers with bilious nausea and green stools; icteric tinge; aggravation mornings. [Clarke], [Boger], [Allen]

Chill: damp, rain, cellars; shivers on going from dry to wet air. Heat: flashes with heaviness; head hot, feet cold. Sweat: clammy in damp weather, does not relieve weakness; night-sweat in basements. [Hering], [Allen]

Desire for sweets, sour things, and fizzy drinks. Aversion to fat and milk. Symptoms aggravated by fruit, cold water, or sour foods. Hunger with weak digestion.

Damp is the dictator. Every system complains when the air is wet: gushing morning stools, damp-asthma with green sputum, bilious congestion, sacro-iliac stiffness on rising, mood dark with rain, warts and moist eruptions, old head injuries relapse in fog. Right hypochondrium is sore, stitches run to right scapula; backache worse rising but better after a little motion; seaside aggravates. The signature is water imbalance—the organism soaks and sags under humidity; it recovers with dryness, sun, and orderly elimination (stool/expectorate). [Hering], [Clarke], [Boger], [Kent], [Boericke], [Phatak]

Damp-weather asthma / bronchitis

• Ant-t. Rattling, no power to raise, cyanosis; Nat-s. has green, ropy sputum, morning loosening, seaside/wet aggravation. [Allen], [Clarke]
• Puls. Evening cough, mild, open air >; Nat-s. morning damp, bilious base. [Farrington]
• Ars. 1–2 a.m., burning, anxiety, heat relieves; Nat-s. less fear, more weather. [Boger]
• Kali-s. Yellow shifting catarrh, better open air; Nat-s. damp worse, green sputum, hepatic tie. [Clarke]

Morning gushing diarrhoea

• Sulph. 5 a.m. driving out with burning, heat-seeking; Nat-s. damp-linked, bilious, green stools. [Boger]
• Pod. Profuse, painless morning stool; Nat-s. colic and bilious taste. [Allen]
• Aloe. Sudden urgency after eating; jelly-like mucus; Nat-s. weather-bound keynote. [Clarke]

Bilious headaches / hepatic

• Bry. Frontal, worse motion/dryness; Nat-s. occiput/vertex, better after stool, damp worse. [Hering]
• Chel. Right scapular stitch, jaundice, constant tongue coat; Nat-s. adds damp sensitivity, morning diarrhoea. [Farrington]

Head injury sequelae

• Hyo./Nat-m./Arn. (behavioural, grief, soreness); Nat-s. when wet weather depresses, photophobia, bilious overlay, suicidal gloom. [Clarke], [Tyler]

Sacro-iliac/lumbago worse on rising

• Rhus-t. First motion < then > from strain/weather; loves hot bathing; Nat-s. damp worse and bilious concomitants. [Boger]
• Calc-ph. Growing pains, weather-sensitive children; less bilious/diarrhoeic. [Allen]

Warts / sycosis

• Thuja. Moist cauliflower, sharp mind-peculiarities; Nat-s. more green catarrh + damp aggravation + liver. [Clarke]
• Caust. Warts + paresis/contracture; Nat-s. lacks paresis, has bilious/damp keynote. [Hering]

• Complementary: Ars. (when fear/burning predominates after chill), Chel. (biliary colic/right scapula), Kali-s. (catarrh), Thuja (sycosis), Sep. (pelvic/hepatic in women), Sulph. (constitutional psora). [Kent], [Clarke], [Boger]
• Follows well: Bry. in bilious headaches; Rhus-t. in damp lumbago when morning stool appears; Nat-m. when dryness gives way to damp sensitivity. [Farrington], [Tyler]
• Precedes well: Chel. and Merc. in hepatic catarrh; Kali-s. in bronchial relapses; Sulph. to open chronic cases before Nat-s. [Clarke], [Boger]
• Antidotes: Nux-v. and Puls. for dietary aggravations; Camph. for medicinal excess. [Clarke], [Allen]
• Inimical/Caution: Rapid alternation with Nat-m. may blur dry vs damp axes; allow the case to declare. [Kent]

• Damp-cellar asthma (green, ropy sputum) + morning rattling: Nat-s. 200C during wet spells; ventilate, dehumidify; watch for morning stool relief. [Clarke], [Farrington]
• Gushing morning diarrhoea after cold drinks/fruit: Nat-s. 30C–200C; warm beverages, avoid beer in rain. [Allen], [Boger]
• Head injury sequelae with damp-weather gloom and bilious headaches: Nat-s. intercurrently; counsel on light exposure/sun therapy. [Hering], [Tyler]
• Sacro-iliac backache worse on rising, damp house: Nat-s. plus morning mobility routine, dry heat; reassess after weather change. [Boger]
• Sea-air aggravation of catarrh/skin: consider Nat-s. before Kali-s. if green predominates. [Clarke]
• Mini-pearls

• • Green, tenacious sputum + seaside/damp worse = Nat-s. until proved otherwise. [Clarke]
  • Morning “barrel of water” stool that drives from bed in rainy weather clinches many cases. [Allen], [Boger]
  • Back catches on getting up, then loosens with short walking—remember Nat-s. when the day is wet. [Boger]

Mind

• Melancholy worse in damp, rainy weather; thoughts of suicide (by shooting). Weather-locked despair. [Hering], [Kent]
• Irritable, morose on waking; music aggravates sadness in dull weather. [Clarke]
• After head injury—mental dullness, gloom in wet weather. [Tyler], [Clarke]

Head

• Bilious headache with bitter taste; better after stool/vomiting. Hepatic nexus. [Allen]
• Headache from damp/fog; heaviness occiput/vertex. [Hering]
• Headache since concussion, worse rising, better lying right side. [Clarke]

Nose/Throat

• Coryza in damp weather; thick green morning discharge. [Hering]
• Post-nasal green mucus, hawked out on rising. [Clarke]

Chest/Respiration

• Asthma in damp cellars or sea-air; green, ropy sputum. Nat-s. keynote. [Clarke], [Farrington]
• Morning rattling, loosens after breakfast; worse rising from bed. [Allen]
• Stitching under right scapula with cough (hepatic link). [Boger]

Abdomen/Rectum

• Diarrhoea, gushing, driving from bed in the morning; worse damp/cold drinks/fruit. [Allen], [Boger]
• Liver sore, enlarged; right scapular stitch. [Clarke]

Back/Extremities

• Backache/sacro-iliac strain worse on rising from seat; better after a little motion; worse damp. [Boger]
• Numb soles on first stepping, morning. [Allen]

Skin

• Moist eruptions worse damp weather; warts flat, moist. [Hering], [Clarke]
• Seborrhoeic patches relapse at seaside. [Clarke]

Generalities

• Damp, rainy weather aggravates; dry warmth ameliorates. Central modality. [Hering]
• Seaside aggravates catarrh and skin. [Clarke]
• Morning on rising aggravates; stool/expectorating relieve. [Allen]

Hahnemann — Chronic Diseases (1828–1830): early notes on Natrum salts and constitutional states.
Hering, C. — The Guiding Symptoms of our Materia Medica (1879–1891): damp-weather modalities, green sputum, morning diarrhoea, head-injury sequelae.
Allen, T. F. — Encyclopaedia of Pure Materia Medica (1874–1879): bilious sphere, hepatic–portal signs, stool and chest keynotes.
Clarke, J. H. — A Dictionary of Practical Materia Medica (1900): seaside/damp aggravation, green catarrh, suicidal impulse rubric, right scapular stitch.
Boger, C. M. — Boenninghausen’s Characteristics & Repertory (1905); Synoptic Key (1915): generalities (damp <, morning <, on rising <, better after motion), hepatic and sacro-iliac pointers.
Kent, J. T. — Lectures on Homoeopathic Materia Medica (1905): miasmatic colouring (sycotic–psoric), mental gloom with weather, comparisons to Nat-m. and Thuja.
Boericke, W. — Pocket Manual of Homoeopathic Materia Medica (1901): asthma of dampness, morning stool, green discharges, sea-air aggravation.
Hughes, R. — A Manual of Pharmacodynamics/Pharmacography (1867–1868): pharmacologic rationale of sodium sulphate (hydragogue, serous balance).
Farrington, E. A. — Clinical Materia Medica (1887): respiratory and hepatic differentials (Ant-t., Puls., Chel.).
Phatak, S. R. — Materia Medica of Homoeopathic Medicines (1977): distilled essentials—damp <, morning diarrhoea, hepatic–green picture.
Tyler, M. L. — Homoeopathic Drug Pictures (1932): head-injury states, damp-weather depression, paediatric hints.
Nash, E. B. — Leaders in Homoeopathic Therapeutics (1899): clinical clinchers—gushing morning stool, marsh fevers, damp asthma.