Many invisible blisters on the fingers are usually associated with ringworm, sweat blisters, and hand-foot-mouth disease, and other causes, and can usually be treated with medication as prescribed by the doctor to improve the discomfort. A. Common causes and treatments: 1. Ringworm: When patients have infections such as ringworm, ringworm red, or trichophyton rubrum on their hands, it usually causes invisible blisters the size of a pin cap to appear between the fingers or on the palm of the hand, which can be accompanied by oozing, molting, and itching. The treatment is based on topical and oral antifungal drugs, which can play an effective control role. 2, sweat blisters: usually grow symmetrically on the hands or feet, with recurring nature, and accompanied by varying degrees of burning, itching and peeling, and severe secondary infection, making the hands swollen and painful. Usually you can apply corticosteroid cream, or use compounded furnace glycolic lotion, boric acid solution, etc. for wet compresses, and if necessary, oral cetirizine for joint treatment; 3, hand, foot and mouth disease: caused by enterovirus, if in addition to the fingertips appear many invisible blisters, accompanied by low-grade fever, sore throat and foot, oral blisters and other symptoms, to promptly go to the hospital, after the diagnosis of standardized antiviral treatment. Second, precautions: patients are advised not to scratch the blisters at will to prevent secondary infection. Pay attention to keep the local dry and clean, and try not to touch water and detergents (soap, washing powder, detergent, etc.) to avoid aggravating the discomfort.