Dolichos pruriens
Substance Background
A tropical legume of the Fabaceae whose pod-hairs contain intensely pruritogenic principles (historically “mucunain”; modern chemistry recognises proteolytic/serotonergic constituents) that provoke violent itching and wheal-like irritation even without visible eruption—an external action that faithfully prefigures the remedy’s keynote “itching without eruption” and the cholestatic/senile pruritus sphere [Toxicology—Hughes], [Allen], [Clarke]. In pharmacy, the fresh irritant hairs or seeds are tinctured and potentised; pathogenesy arises from provings compiled by Allen and Hering and abundant clinical confirmations in nocturnal pruritus, pruritus vulvæ/ani, hepatic itch with jaundice, and obstinate constipation with maddening cutaneous itch and insomnia [Hering], [Allen], [Clarke], [Boericke]. Cowhage hairs were once used crudely as a mechanical anthelmintic (vermifuge) by irritating intestinal parasites—this anthelmintic history helps explain the anal and genital border-itching recorded clinically [Hughes], [Clarke].
Proving Information
Fragmentary provings and clinical pathogenesy were gathered by Hering and Allen; Clarke consolidated the picture: violent itching, worse at night and in bed, often with no rash; constipation; right-sided facial neuralgia; hepatic derangement with jaundice and pruritus; pruritus vulvæ/ani [Proving/Clinical—Hering], [Allen], [Clarke]. Early practitioners repeatedly confirmed senile pruritus, pregnancy itch, and anal/genital itching that drove to sleeplessness, together with constipation and a peculiar right-sided facial neuralgia intensifying at night [Boericke], [Boger], [Phatak].
Remedy Essence
Dolichos is psora in its starkest surface form: maddening itching with little or no eruption, ruling the night, fanned by heat, subdued by cool air and cool ablutions. The kingdom signature—cowhage hairs that provoke itching “out of all proportion”—translates precisely into the homœopathic portrait: the patient searches for a rash and finds none, yet the urge to scratch is irresistible; scratching is treacherous—giving a flash of satisfaction and then burning and renewed itch. The modalities are crystalline: worse at night, worse warmth of bed and hot bathing, worse wool/friction, better cool sponging, open air, uncovering, and light linen. These are not mere comforts; they are diagnostic laws that must reappear in the case’s behaviour (standing by the open window, flinging off covers, fleeing hot baths). The organ affinities triangulate the selection: (1) Skin borders and folds—anus, vulva, scrotum, canthi—become theatres of torment; (2) Liver—cholestatic pruritus with jaundice, dark urine, clay stools, and constipation, where the itch exceeds the rash; (3) Nerves—a right-sided facial neuralgia that shares the same nocturnal, heat-worse signature or alternates with the itch. The age and state colouring is strong: senile skin—dry, thin, reactive; pregnancy and lactation—hormone and skin-stretch contributions; both amplify Dolichos’s law.
Miasmatically the remedy is psoric, with sycotic recurrence and slight syphilitic excoriation after furious scratching. The pace is chronic–paroxysmal: quiet days, then nights of tyranny; the reactivity is peripheral (sensory endings/c-fibres) rather than exudative—hence the absence of eruption so characteristic. Core polarities sharpen the decision: cool ↔ heat, night ↔ day, uncovered ↔ covered, border surfaces ↔ deep tissue, itch primary ↔ wheal secondary. Micro-comparisons clinch selection: Rhus is better hot and shows vesicles; Urtica gives wheals first; Sulphur is also worse warmth of bed but is dirtier, often eruptive, and not so cool-seeking; Arsenicum burns and seeks heat, the thermal opposite. In hepatic cases, Chelidonium paints the liver; Dolichos paints the skin’s cry from the liver’s error. Clinically, cure demands obedience to the law: ventilate, lighten coverings, avoid hot baths, choose tepid/cool washing, swap wool for linen, and calm the diet (avoid fats/sweets). A right prescription shows itself immediately in sleep returned—the sufferer dozes through first sleep without a leap to scratch; palms/soles no longer fly from bedclothes; the anal/vulvar borders bear the contact of linen; jaundice lightens with bowel regulation. Dolichos is thus the quintessential remedy when the surface shouts, the night betrays, the heat torments, and the eye cannot find the rash that torments.
Affinity
Fragmentary provings and clinical pathogenesy were gathered by Hering and Allen; Clarke consolidated the picture: violent itching, worse at night and in bed, often with no rash; constipation; right-sided facial neuralgia; hepatic derangement with jaundice and pruritus; pruritus vulvæ/ani [Proving/Clinical—Hering], [Allen], [Clarke]. Early practitioners repeatedly confirmed senile pruritus, pregnancy itch, and anal/genital itching that drove to sleeplessness, together with constipation and a peculiar right-sided facial neuralgia intensifying at night [Boericke], [Boger], [Phatak].
- Remedy Kingdom and Biological Family
Plant: Fabaceae (Leguminosae) [Clarke], [Hughes].
- Affinity
- Skin (peripheral sensory endings) — Violent itching without eruption; wheals, if any, are scant and secondary to rubbing; worse at night/bed warmth, better cool applications; chief sphere in senile and cholestatic pruritus [Hering], [Boericke], see Skin/Sleep/Generalities.
• Mucocutaneous borders — Pruritus ani (worms/ascarides history), pruritus vulvæ (gestational/menopausal), scrotal/inguinal itching; burning and excoriation follow scratching [Clarke], [Phatak], see Rectum/Female/Male.
• Liver & bile — Itching with jaundice, dark urine, clay stools; hepatic tenderness/right hypochondrial ache; constipation; itch out of proportion to visible lesions [Hughes], [Clarke], see Abdomen/Urinary/Generalities.
• Nervous system (neuralgia/paresthesia) — Right-sided facial neuralgia, worse night and motion, sometimes alternating with or accompanying skin-itch; itching of palate/ears/nostrils [Allen], [Clarke], see Face/Mouth/Ears/Nose.
• Sleep axis — Insomnia from itching, mind keyed up by night-torment, with great relief after cool sponging; the skin–sleep linkage is diagnostic [Hering], [Boericke], see Sleep.
• Aged & gravid states — Senile pruritus, pregnancy itch (abdomen, breasts, vulva), lactational nipple-itch; modalities identical to the general law [Clarke], [Phatak], see Female/Skin.
• Intestines/rectum — Constipation obstinate; itching anus from ascarides; ineffectual urging; stool hard, knotty, with burning after scratching [Hering], [Allen], see Rectum.
• Teeth/gums — Itching of gums; nocturnal dental–facial neuralgias, right-sided preponderance, with sleepless itch [Allen], [Clarke], see Teeth/Face.
Better For
Cool applications, cool sponging, cool open air; patient seeks the window and the cold side of the bed [Clarke], echoed in Skin/Sleep/Generalities.
• Gentle rubbing and scratching for the moment—yet after-relapse burning follows (see reciprocal under Worse) [Hering].
• Night-walking in cool rooms; loosening bedclothes and ventilating reduces torment [Boericke].
• Uncovering the affected part; heat-trap of clothes aggravates [Clarke].
• After stool in some hepatic/anal cases when pruritus is reflex from congestion [Hughes].
• Milk-baths or bland unguents (palliative) with constitutional dosing [Clarke].
• Tepid—not hot—washing of genital/anal borders; patients learn this by experience
Worse For
- Night, especially after midnight; itching drives from bed and forbids sleep [Hering], [Boericke].
• Warmth of bed, heated rooms, and sweating; the itch flames under heat-trap [Clarke].
• Scratching—momentary relief, then burning and renewed itching, often without visible eruption [Hering].
• Pregnancy, senility, and lactation; hormones and skin-dryness lower thresholds [Clarke], [Phatak].
• Lying on the affected part; pressure-heat synergy [Allen].
• Constipation and hepatic congestion; itch intensifies until bowels move (liver–skin link) [Hughes], [Clarke].
• Wool, rough seams, tight garments (friction) [Clarke].
• Hot bathing; rebound itch follows, distinguishing from Rhus (better hot) [Hering].
• Sweets/greasy foods in biliary subjects (dietary aggravation by experience) [Clarke].
• Worms/ascarides—pruritus ani worsens at night (children and aged) [Allen], [Hering].
Symptomatology
Mind
The mental picture is secondary to skin torment: irritability, fretfulness, and a kind of despair that peaks at night when itching forbids rest—he dreads the approach of bedtime, knowing he will pace or tear at the skin; this squares with the general night aggravation and the sleep section’s broken first sleep [Hering], [Boericke]. A nervous tension accumulates under the curfew of itch: noises are hateful, clothes are intolerable, and the patient becomes fastidious about seams and wool, reflecting the friction aggravation noted under Modalities [Clarke]. The aged grow hypochondriacal from long-standing useless treatment; relief by cool sponging restores their humour, echoing the cool-open-air amelioration found throughout [Clarke]. In pregnancy, the expectant mother becomes anxious, ashamed by genital itching; she seeks the cool and avoids warm baths after learning their mischief—objects that match the Female and Skin modalities [Phatak]. Sleeplessness engenders impatience and tears; yet there is no profound melancholia, only a reactive mind tethered to a psoric skin [Kent]. After relief (cooling, a dose taken), mood rises disproportionately, proving the mind was bound to the skin torment [Clarke]. Children are peevish at night, rub the anus and vulva, then fall asleep exhausted; after a cool wipe and airing they smile, the behaviour reinforcing Dolichos’s simple law: heat betrays, cool relieves [Hering].
Head
Head is hot to the hand while the patient feels “prickles” in the scalp; he rummages the hair for a rash that is not there—a pure Dolichos paradox of itching without eruption [Allen]. Warm rooms intensify scalp itch; standing by an open window soothes, as in Generalities [Clarke]. A tight band feeling accompanies sleepless nights; in bilious subjects the temples throb after fatty supper, and scalp prickles return as the liver protests (liver–skin axis) [Hughes]. The right-sided facial attack is peculiar: tic-like neuralgia of the right cheek, worse at night, worse motion and jar, sometimes alternating with or following days of skin itch—this shifting of the complaint from surface to nerve is typical of Dolichos [Clarke], [Allen]. Head covering of wool aggravates scalp itch; linen is borne [Clarke]. As sleep returns, head pressure lifts with the itch’s retreat—functional more than structural [Hering].
Disclaimer
Educational use only. This page does not provide medical advice or diagnosis. If you have urgent symptoms or a medical emergency, seek professional medical care immediately.