Homeopathic remedies for eczema: materia medica and differentiation
Eczema in the classical literature is not one disease but a family of eruption pictures sorted by character, location, sensation, and modality. Eight remedies dominate the chapter. What follows is each picture, the keynotes that pin it, and the axes that separate one from another at the bedside.
Red-flag presentations
A handful of presentations are emergencies and need urgent assessment: eczema herpeticum (clusters of punched-out blisters with fever), rapidly spreading infection with golden crusting or systemic signs, periocular involvement affecting vision, severe uncontrolled flares in infants, and any presentation suggesting anaphylaxis.
The classical remedy pictures
| Remedy | Classical picture |
|---|---|
| Sulphur | Dry, red, intensely itchy; scratching feels pleasurable then burns; worse from warmth and bathing |
| Graphites | Moist eruptions oozing honey-like fluid; in the flexures, behind the ears, on the hands; skin thickens and cracks |
| Petroleum | Deep, painful fissures; rough, leathery skin; markedly worse in winter, nearly well in summer |
| Arsenicum album | Dry, scaly, burning eruptions, paradoxically better from warmth; anxious, restless, fastidious patient |
| Rhus toxicodendron | Vesicular, blistering eruptions with intense itching and bodily restlessness |
| Calcarea carbonica | Crusty scalp and facial eruptions in the plump, sweaty-headed, slow-to-warm infant |
| Mezereum | Thick, hard crusts beneath which pus collects; burning worse at night; intolerable nocturnal itch |
| Antimonium crudum | Honey-yellow crusts on scalp; white-coated tongue as constitutional keynote; worse from heat and washing |
Remedy portraits
Sulphur anchors the skin chapter. Dry, rough, red skin with voluptuous itching — scratching gratifies for a moment, then burns — aggravated by the warmth of the bed and by bathing. The dishevelled, heat-intolerant Sulphur constitution carries the picture. It leads in Eruptions, dry and Itching, warm, becoming.
Graphites holds the moist territory: eruptions in the bends of elbows and knees — exactly where atopic eczema characteristically locates — oozing a sticky, honey-coloured fluid that dries to fissured crusts, with thickened, cracking skin behind the ears and on the palms. The ooze is the primary keynote separating Graphites from Sulphur.
Petroleum is distinguished above all by its seasonal keynote: skin that splits painfully at the fingertips and knuckles, rough and leathery, dramatically worse each winter and nearly well in summer. Deep, bleeding cracks at the tips of the digits are characteristic.
Arsenicum album covers dry, scaly, burning eruptions with the defining modality paradox — burning better from heat. The patient is anxious, restless, fastidious; eruptions tend toward the face and upper body. Burning better from warmth sharply separates Arsenicum from Sulphur, which is worse from heat.
Rhus toxicodendron, from poison ivy, maps to vesicular, blistering eruptions with intense itching and marked bodily restlessness — the patient cannot keep still. The vesicular character separates it from the predominantly dry pictures of Sulphur and Arsenicum.
Calcarea carbonica runs through the paediatric casebooks for crusted scalp eruptions (crusta lactea, milk crust) in its constitutional type: a placid, sweaty-headed infant or child, slow to develop, prone to colds, chilly overall. The constitution outweighs the precise eruption character.
Mezereum is the more extreme picture: thick, leathery crusts beneath which pus accumulates, lifting off to reveal raw, oozing skin; burning itch worse at night, often driving the patient to scratch until the area bleeds. Mezereum's crusts are harder and thicker than those of Graphites, and the nocturnal aggravation is marked.
Antimonium crudum takes the honey-yellow, thick scalp crust with a prominently white-coated tongue — a constitutional keynote more diagnostic than the eruption morphology alone. Worse from heat and washing.
Differentiation
Moisture state. Sulphur and Arsenicum are dry; Graphites is moist and oozing; Rhus is vesicular; Mezereum is crusted over suppurating skin; Petroleum produces dry fissures rather than true eczematous ooze.
Temperature modality. Sulphur is worse from heat; Arsenicum is better from heat; Petroleum is worse from cold; Rhus is better from warmth and motion.
Seasonal pattern. Petroleum's winter aggravation is among the clearest seasonal keynotes in the skin materia medica.
Location. Graphites favours flexures and retroauricular skin; Calcarea and Antimonium crudum favour scalp and face in children; Mezereum characteristically affects the head with suppuration beneath the crust.
Constitutional keynotes as tiebreakers. The sweaty head and slow temperament of Calcarea, the white-coated tongue of Antimonium crudum, the fastidious restlessness of Arsenicum — these decide between two remedies that share a similar eruption character. Terms such as modality, vesicular, and rubric are explained in the glossary.
The skin chapter of the classical repertory holds this catalogue at full resolution, with rubrics for eruption character, location, sensation, and modality cross-referencing all eight remedies above; you can search the free repertory by symptom to drill into any of them.
References
Boericke, W. (1927) Pocket Manual of Homoeopathic Materia Medica with Repertory, ninth edition, Philadelphia: Boericke & Tafel.
Kent, J. T. (1905) Lectures on Homoeopathic Materia Medica, Philadelphia: Boericke & Tafel.
Clarke, J. H. (1900) A Dictionary of Practical Materia Medica, three volumes, London: Homoeopathic Publishing Company.
Hering, C. (1879–1891) The Guiding Symptoms of Our Materia Medica, ten volumes, Philadelphia: American Homoeopathic Publishing Society.
Hahnemann, S. (1828) Die chronischen Krankheiten, ihre eigenthümliche Natur und homöopathische Heilung, Dresden & Leipzig: Arnoldische Buchhandlung.