Ringworm on the hands may be related to pathogenic bacterial infection, localized dampness and sweating, as well as weaker immunity. 1. Pathogenic bacterial infection: if direct contact with the skin lesions of patients with the disease or contact with contaminated objects, it may lead to the organism being infected by microscopic rod-shaped bacilli of the genus Corynebacterium, which may lead to the appearance of red ringworm. 2. Localized dampness and sweating: if the hands are in a long-term damp situation or the hands are often sweaty, increasing the chance of infection, it may induce ringworm. 3. Weak immunity: if the body’s immunity is weak, it may be difficult for the body to resist the invasion of foreign germs, which may lead to the appearance of ringworm. The causes of ringworm are not one and the patient is advised to consult a doctor for examination, clarify the cause and follow the doctor’s instructions for treatment.