What should you know about white itchy bumps on skin?

Raised marks that appear suddenly and change position may fit hives. Dryness, cracking, or rough scale can accompany eczema, while a new soap, cosmetic, fabric, or adhesive can cause contact dermatitis. Bumps centred on hairs may follow shaving, sweat, or follicle inflammation. A moist-fold rash can be yeast-related; persistent thickened or scaly areas need a clinician to distinguish among inflammatory conditions.

Notice where the bumps began, whether they spread, how long each mark lasts, and whether there is pain, scale, blisters, fever, or swelling of the lips and eyes.

Keep nails short, use cool compresses, and apply a plain moisturiser if the surface is dry. Stop any newly introduced fragranced product and avoid hot water, harsh scrubbing, and tight clothing. Photograph changes in daylight. A pharmacist can advise on an appropriate non-prescription option, but avoid using leftover antibiotics, antifungals, or steroid creams without knowing the likely pattern.

Seek urgent help for breathing difficulty, throat or tongue swelling, faintness, blistering, skin peeling, or a rapidly spreading reaction. Arrange a clinical review when itching prevents sleep, bumps recur, become painful or infected-looking, or do not settle after removing an obvious irritant. Household members with similar intense itching also merit prompt advice.

Which features point toward hives, eczema, contact dermatitis, follicle inflammation, or infection? Could a medicine or product be involved? What can I use safely, and when should I return if it changes?