Blisters i.e. blisters. Small blisters on the hands on hot days are considered to be related to diseases such as sweating herpes, ringworm and scabies. General treatment, medication and other methods can be taken to relieve the symptoms. 1. Sweat blisters: sweat blisters occur on the palms of the hands and soles of the feet, and are prone to occur in the hot summer months, resulting in dense localized blisters, accompanied by pain and itching. You can use topical glucocorticoid ointment, such as tretinoin urea ointment, tacrolimus ointment, pimecrolimus ointment, etc., which can relieve the swelling and irritation of the skin. 2. Ringworm: ringworm is caused by fungal infections, such as blister-type ringworm, which may lead to the appearance of pinpoint-sized deep in blisters between the fingers and palms. It is mainly treated with antifungal drugs, such as bifonazole cream, miconazole nitrate cream, terbinafine cream, itraconazole capsule, terbinafine hydrochloride tablets and so on. 3. Scabies: Scabies is a transmissible skin disease, caused by the scabies mite infection, usually occurs in the thin and tender skin, resulting in localized pinpoint-sized pimples and papules. Sulfur ointment and benzyl benzoate cream can be used externally to inhibit or kill scabies mites. If itching is obvious, antihistamines such as loratadine and cetirizine can be given to help relieve itching. Small blisters on the hands on hot days, it is recommended to pay attention to the daily care, do not often contact with alkaline detergents, do not scratch the stimulation induced infection. There may be other reasons for the small blisters on the hands on hot days, it is recommended to go to the hospital in time to find out the cause, symptomatic treatment, the above drugs need to be used in accordance with the doctor’s instructions.