What should you know about the most potent topical steroid?

Clobetasol propionate is an example of a very potent topical corticosteroid. It lowers inflammatory activity in the skin, which can ease redness, swelling, itching and thickened plaques. Strength is only one part of safety: thin skin, broken skin, large treatment areas and covered areas can absorb more medicine. The face, groin, armpits and genital skin need particular caution because unwanted thinning and irritation can develop more readily there.

Apply a thin layer to the affected skin exactly as prescribed, and wash your hands afterwards unless your hands are being treated. Do not extend the course, use it for a new rash, or cover the area with a dressing without advice. Keep it away from the eyes and avoid sharing the tube. A clinician may choose a milder steroid, a break between courses, or another treatment for maintenance. Read more about [Clobetasol Propionate](/materials/clobetasol-propionate/) and [Topical Corticosteroids](/treatments/medical-dermatology/topical-corticosteroids/).

Contact a clinician if the rash spreads, becomes painful, oozes, develops crusting, or does not improve as expected. Seek prompt advice for blurred vision, severe eye pain, marked skin thinning, or a rash that worsens after treatment. Genital or vulval symptoms deserve an examination before applying a very potent steroid; guidance on [Topical Steroid Treatment for Vulval Skin](/treatments/medical-gynaecology/topical-steroid-treatment-for-vulval-skin/) may help frame that discussion.

Ask which diagnosis is being treated, where the medicine may be applied, how much to use, when to stop, and what to use if the rash returns. Ask whether a follow-up is needed and which changes should prompt an earlier review.