Itchy ringworm may be caused by previous ringworm and onychomycosis, environmental stimuli, low immunity, long-term use of glucocorticoids and other reasons. 1. Previous tinea cruris and onychomycosis: due to previous illnesses such as tinea cruris and onychomycosis, and not paying attention to personal hygiene. Frequent scratching of the affected skin may bring bacteria to other parts of the body, so it triggers ringworm and itchy skin. 2. Environmental stimulation: due to being in a humid, warm or dry environment for a long time, as well as serious pollution of the surrounding environment, etc., may trigger ringworm, resulting in itchy skin. 3. Low immunity: Since ringworm is a fungal infectious disease, if one’s immunity is low, it will increase the chance of fungal infection. For example, patients with chronic diseases such as diabetes and high blood pressure are more likely to cause ringworm attacks and itchy skin. 4. Long-term use of glucocorticoids: If long-term use of glucocorticoids, especially for external use. It will lead to a decrease in the resistance of the skin, causing ringworm attacks and itchy skin. Patients with itchy ringworm should go to the hospital in time, cooperate with the doctor for examination and standardized treatment. It is recommended that patients pay attention to skin cleanliness and hygiene, and maintain a healthy and light diet.