Skin Rashes

Skin rashes are a description rather than a diagnosis. The same red, itchy skin can come from contact with an irritant or allergen, eczema, a viral infection, a fungal infection, heat and sweat, an insect reaction, or a drug reaction - and the right treatment differs completely between them. The useful clues are pattern and timing: where the rash started and spread, whether it itches or hurts, whether it is scaly, blistered or raised in weals, and what changed in the days before it appeared (new soap, detergent, jewellery, plant contact, medication, or illness). Most mild rashes settle within a week with an emollient, avoidance of the suspected trigger, and short-term topical treatment where appropriate. The important thing is knowing which patterns are not mild: rash with fever, rapidly spreading redness with pain, blistering or peeling, involvement of the mouth or eyes, or a rash that does not fade under gentle pressure all need same-day assessment. Supplement evidence in undifferentiated rash is thin. Where a rash reflects eczema, there is modest support for correcting vitamin D deficiency and for probiotics in some paediatric contexts, but nothing that substitutes for identifying the cause.