Medicines for Contact dermatitis

The mainstays are emollients (moisturisers) used regularly to protect and restore the skin barrier, and a topical corticosteroid to calm an active flare by reducing inflammation and itch — the strength of the steroid is matched to how severe the dermatitis is and where it is on the body. These work best alongside the single most important step, which is identifying and avoiding the substance causing the problem; without that, the skin tends to flare again. Where an allergy is suspected, patch testing helps pin down the allergen. Which products are right for you, and how to use a topical steroid safely, is something to decide with your pharmacist or doctor.

Both cause red, itchy, inflamed skin where something has touched it, but the mechanism differs. Irritant contact dermatitis — the more common type — happens when the skin is directly damaged by a substance such as soap, detergent, solvents or frequent water exposure; given enough contact it can affect anyone. Allergic contact dermatitis happens when the immune system becomes sensitised to a specific substance, such as nickel, fragrance or hair dye, and then reacts to it on later contact, sometimes even in tiny amounts. They can look alike and sometimes overlap, and patch testing is used to confirm and identify an allergy.

The pattern and location of the rash are the first clues — for example a band where a watch sits, or dermatitis on the hands in someone doing a lot of wet work. Keeping track of what your skin touches and when it flares can help. For suspected allergic contact dermatitis, the specific test is patch testing, carried out in a dermatology clinic: small amounts of common allergens are applied to the skin under patches and read over a few days to see which produce a reaction. This can identify allergens such as nickel, fragrances and preservatives so you know exactly what to avoid. Your GP can refer you if patch testing is needed.

In most cases the skin clears once the trigger is removed and the barrier is given time to recover, helped by regular emollients and a short course of a topical corticosteroid for flares. The key is consistent avoidance — if contact with the irritant or allergen continues, the dermatitis tends to persist or keep returning. Some people, particularly those with hand dermatitis or an unavoidable workplace exposure, find it becomes a longer-term problem that needs ongoing skin protection and care. If your dermatitis is not settling despite avoiding the likely cause, is severe or widespread, or shows signs of infection, see your doctor for review.