White ulcers on the penis may be caused by factors such as overstimulation, circumcision, and genital herpes. 1. Overstimulation: for example, the use of irritating toiletries or excessive friction, resulting in damage to the local skin of the penis, may make the local skin white ulcers. 2. circumcision and glansitis: a long time not to wash the penis, easy to induce circumcision and glansitis, stimulation by inflammatory substances, may lead to localized white ulcers on the penis, accompanied by itching, tingling and other symptoms. 3. Genital herpes: a sexually transmitted disease, usually caused by herpes simplex virus infection, in the early stages of blisters, blisters will gradually erode, white ulcers can be formed, accompanied by obvious tingling and itching. If you have white ulcers on your penis and are experiencing significant discomfort, it is recommended that you seek medical attention for examination and treatment.