Tofu slag on the glans may be caused by circumcision scale, candidiasis, etc., and should be promptly consulted to find out the cause of the disease. 1. circumcision: due to the narrow foreskin opening of the prepuce or the foreskin covering the head of the penis can not be turned up to reveal the urethral opening or the head of the penis; or the foreskin is too long, irregularly upturned to clean the foreskin caused by the situation, which will lead to the glans tofu slag. 2. Candida glans phimosis: Inflammation of the foreskin and glans caused by infection with Candida, which can be transmitted through sexual contact. The foreskin and glans skin can show a macerated or dry dark red appearance, some show light red vesicles and thin-walled pustules, and there can be white cheese-like patches on the inner skin of the foreskin and the glans coronal groove. This symptom alone is not enough to diagnose the disease, there may be other factors that cause it. It is recommended that the patient consult a doctor in time to clarify the cause of the disease and give targeted treatment.