How common is skin rash in contact dermatitis?

It can be itchy, dry, burning, swollen, scaly, or blistered. The area involved may give a clue, such as hands after frequent wet work or skin beneath a cosmetic, metal, or adhesive.

Contact dermatitis is a skin reaction caused by direct exposure. Irritant contact dermatitis can follow repeated contact with substances that damage the skin barrier, while allergic contact dermatitis involves sensitivity to a particular substance.

The timing can differ: irritation may occur after repeated exposure, whereas an allergic reaction can appear after prior sensitisation. A rash does not, by itself, reveal the trigger or prove that contact dermatitis is the cause.

Stop using any newly introduced product on the affected skin until you have advice. Rinse away suspected irritants with lukewarm water, use a simple fragrance-free moisturiser, and avoid scrubbing or fragranced products while the skin heals.

Keep a note of products, gloves, jewellery, hair dye, workplace materials, and activities that touch the area. A clinician may recommend treatment or testing to help identify a suspected allergen.

Get medical advice if the rash persists, keeps returning, affects the face, hands, genitals, or a large area, or interferes with daily activities. Urgent assessment is needed for breathing difficulty, swelling of the lips or tongue, widespread blistering, fever, or rapidly worsening pain.

Prompt review is also sensible when the skin becomes hot, very tender, weepy, or crusted, as these changes can point to infection or a more severe reaction.

Ask what exposures are most relevant to the location of your rash, whether patch testing could help, and which protective gloves or skin-care products suit your situation. Take product labels or clear photos of the affected area to the appointment.