Itchy right hand heart may be caused by ringworm, sweat herpes and other diseases. 1. Ringworm: The cause of this disease is mostly related to the invasion of skin by dermatophytes, including Trichophyton rubrum and Trichophyton mustelii. It is usually characterized by hyperkeratotic lesions on the hands, flaking, dryness and itching. 2. Sweat herpes: the cause of this disease may be local allergies, dermatophyte infections, as well as ultraviolet radiation, mental and other factors. It usually manifests as intensely itchy blisters on the hands and feet, often symmetrically distributed. The causes of itchy right hand heart are more, it is recommended that patients seek medical examination to clarify the cause of the disease.