Skin blisters — causes, treatment and when blisters need a dermatologist

Key facts

• Friction and minor burn blisters usually heal alone
• Leave blisters intact and protect them when possible
• Allergies, infections and medicines can cause blisters
• Unexplained blisters may need a skin biopsy
• Widespread blisters with fever need emergency care

Friction and heat blisters

Friction blisters form when skin is repeatedly rubbed, for example by new or tight shoes, sports equipment, tools or long walks in the heat. Sweat and heat make skin more prone to friction blisters, which is common in Dubai’s summer. Burn blisters occur after scalds, contact with hot surfaces, or sunburn, which can be severe in the UAE’s strong sun. The fluid inside the blister protects the healing skin underneath. Prevention includes well-fitting footwear, moisture-wicking socks, protective tape or padding on high-friction areas, and sun protection. Most friction and minor burn blisters heal within one to two weeks.

To pop or not to pop

In general, it is better not to pop a blister, because the intact skin acts as a natural dressing and lowers the risk of infection. Cover small blisters with a soft dressing or blister plaster and protect them from further rubbing. If a blister is large, very painful or likely to burst on its own, a doctor or nurse may drain it with a sterile needle, leaving the roof in place. If a blister bursts, gently clean it with water, do not peel off the loose skin, and cover it with a clean dressing. People with diabetes or poor circulation should seek advice rather than treating foot blisters themselves.

Allergic and infectious blisters

Some blisters are caused by allergic or irritant reactions, such as contact dermatitis from plants, metals, adhesives or chemicals, insect bites, or certain types of eczema that cause small, itchy blisters on the hands and feet. Infections can also cause blisters, including impetigo, a bacterial infection that leaves honey-coloured crusts, cold sores and genital herpes, chickenpox, shingles and hand, foot and mouth disease in children. Some medicines can cause blistering reactions. These need the right diagnosis, because treatment ranges from soothing creams to antibiotics or antivirals, and some reactions require stopping a medicine.

Autoimmune blistering diseases

Less commonly, blisters are caused by the immune system attacking proteins that hold the skin layers together. Bullous pemphigoid usually affects older adults and causes large, tense, itchy blisters, sometimes preceded by an itchy rash. Pemphigus causes fragile blisters that break easily and can affect the mouth, leaving painful erosions. Dermatitis herpetiformis, linked with coeliac disease, causes very itchy small blisters on the elbows, knees and buttocks. These conditions need specialist diagnosis with a skin biopsy and often special laboratory tests. Dr. Abdullah Anis’s fellowship in dermatopathology at St John’s Institute of Dermatology in London supports careful assessment of blistering disease.

When blisters need urgent care

Seek urgent medical help if blisters are widespread, appear suddenly with fever or feeling unwell, involve the mouth, eyes or genitals, or develop after starting a new medicine, as these may signal a serious drug reaction such as Stevens-Johnson syndrome. Large burns, burns on the face, hands, feet or genitals, and chemical or electrical burns also need emergency care. Signs of infection, such as spreading redness, warmth, pus, red streaks or fever, need prompt review. For recurring or unexplained blisters that are not an emergency, book an assessment with Dr. Abdullah Anis, a specialist dermatologist with more than 25 years of experience.

Eczema and psoriasis are chronic inflammatory skin conditions. Good control comes from an accurate diagnosis, a clear plan for flares, and daily skin care that suits the UAE climate.

Prepared by the Manhal Medical Center editorial team · Updated: 2026-10-18 · Treating specialist: Dr. Abdullah Anis

This page is general information and does not replace a consultation. Suitability, risks and results vary between patients.