The ulceration of the foreskin grows white skin with itching, which may be related to the cause of the foreskin glans, eczema, allergic dermatitis and so on. 1. Foreskin glansitis: the foreskin and glans are infected by bacteria and other pathogens, which can cause an inflammatory reaction, and ulcers, itching and other symptoms can appear. 2. Eczema: usually manifested as pimples and papules on the basis of skin erythema, often accompanied by intense itching, scratching can cause localized ulceration. 3. Allergic dermatitis: if contact with condoms and other allergenic substances, can appear in the local erythema, pimples, accompanied by itching, pain and other symptoms, and in severe cases can lead to skin erosion, peeling and so on. It is recommended to find the foreskin ulceration, white skin and itching, go to the hospital in a timely manner, after the cause is clear in the doctor’s guidance for standardized treatment.