Bubbling sunburn: what to know

Sunburn can cause skin redness, heat, tenderness, and later peeling. Fluid-filled bubbles are blisters: the upper skin layers have been injured and separated enough for fluid to collect. Blistering can make the area vulnerable to infection, especially if the surface opens. The affected skin may remain sore while it heals, and further sun exposure can worsen the injury.

Move out of direct sun and cool the area with a clean, cool damp cloth; avoid ice directly on the skin. Wear loose clothing and leave blisters intact. Do not peel loose skin or apply harsh antiseptics, oils, or numbing products unless a clinician recommends them. A bland emollient may help once the skin is not actively blistering or weeping. Drink fluids and use pain relief only if it is suitable for you. Ask a clinician before using topical corticosteroids on blistered skin.

Seek prompt medical care for widespread blisters, severe pain, facial or eye involvement, dehydration, vomiting, dizziness, confusion, or fever. Get advice if blisters become increasingly red, warm, swollen, foul-smelling, or produce pus. Emergency help is needed for fainting, confusion, or breathing difficulty.

Ask how to dress an open blister, which pain relief is safe for you, and whether the burn needs review. Discuss sun protection while healing and how to reduce later sun-damaged skin.