What causes small blisters and peeling on the hands?

There are numerous causes of blistering and peeling on the hands. A relatively common cause is allergic contact dermatitis, which typically occurs after exposure to substances to which the individual is sensitive, resulting in localized peeling and blister formation. Another frequent cause is dyshidrotic eczema (also known as pompholyx), often associated with excessive hand sweating; this condition also manifests as localized blisters and scaling.

Some patients may have keratolysis exfoliativa, which similarly presents with scaling. Another possible cause is fungal infection; certain patients with fungal infections also exhibit scaling and localized blisters.

Therefore, to determine the exact underlying cause, an in-person clinical evaluation at a hospital is essential. Based on the physical examination, the physician will decide which diagnostic tests are appropriate—for example, in suspected fungal infection, potassium hydroxide (KOH) microscopy or fungal culture may be performed. Antifungal therapy would then be initiated if infection is confirmed. In cases attributable to allergy—as previously mentioned—antiallergic treatment would suffice.