Sunburn that turns purple: what to know

A typical sunburn is often red, hot and tender, then may peel. Purple or dusky skin can occur when inflammation is intense, when blood has leaked beneath the surface, or when circulation is impaired. The appearance alone cannot identify the cause. Compare both sides in good light and note whether the colour fades with pressure, expands, becomes numb or forms blisters. Information about [Sunburn](/conditions/sunburn/) and [Skin Redness](/symptoms/skin-redness/) may help you describe the change, but neither replaces an examination.

Stop further sun exposure and keep the area cool with a damp cloth. Do not massage, scratch, scrub or puncture the skin, and avoid tight clothing over the area. Use a bland moisturiser only on intact skin; [Emollient Therapy](/treatments/medical-dermatology/emollient-therapy/) describes barrier care. Photograph the area in consistent light so changes can be compared. Avoid applying steroid, numbing or bleaching products unless a clinician recommends one, particularly on the face or broken skin.

Seek urgent medical care if purple skin is rapidly spreading, very painful, cold, numb, swollen or associated with weakness, dizziness, fever, confusion or breathing difficulty. Get prompt assessment for extensive [Skin Blisters](/symptoms/skin-blisters/), open areas, pus, marked tenderness or a colour change that does not improve. A clinician can check circulation, the depth of the burn and whether another process is present. Do not wait for peeling to clarify a concerning change.

Ask what may explain the purple colour, whether circulation or bruising needs checking, and how to dress or moisturise the area. Explain when the colour began, whether it is spreading, and any medicines or bleeding tendency.