Small red dots on skin that itch: what to know

New soap, detergent, fragrance, fabric, or plant exposure can trigger contact dermatitis. Dry, cracked skin may cause asteatotic eczema, while recurring itchy patches can occur with atopic dermatitis or psoriasis. Hives tend to be raised and may appear or fade quickly. Scabies commonly causes intense itching, often worse at night, and may affect close contacts. A clinician may also consider a yeast infection when redness is moist or concentrated in skin folds. Lichen planus is another inflammatory possibility. A skin examination is more useful than colour alone because bites, irritation, and several rashes can look alike.

Pause any recently introduced scented product and wash gently with lukewarm water. Apply a plain, fragrance-free moisturiser while the skin is still slightly damp, keep nails short, and use a cool compress instead of scratching. Wear loose, breathable clothing and avoid rubbing the spots. Do not share towels or bedding if scabies is possible. Photograph the rash and note where it began, whether it spreads, and what preceded it. A pharmacist or clinician can advise whether an anti-itch product is suitable for your age, location, pregnancy status, and other medicines.

Seek urgent help if the rash comes with trouble breathing, swelling of the lips or tongue, faintness, blistering, skin peeling, severe pain, fever, or purple-red spots that do not fade when pressed. Arrange a medical assessment when the rash is rapidly spreading, oozing, infected-looking, disrupting sleep, or not settling after removing a suspected irritant. Persistent or recurrent itching deserves review even when the dots are small.

Could this be contact dermatitis, eczema, hives, scabies, or an infection? Does the distribution suggest a particular cause? Which products or treatments should I avoid? Should anyone I live with be checked? What changes would require urgent review?