If a white substance appears on the surface of a man’s glans, it may be circumcision, which is more common in men who are overcircumcised or do not pay attention to hygiene. If the patient has no obvious symptoms of discomfort, he can first use water for local rinsing to wash off the prepuce and observe whether it will recur. If you are suffering from uncomfortable symptoms, such as frequent urination, urinary urgency or localized rash, papules and pain, redness and swelling, you should go to the hospital for treatment, which can be secondary to glans penis, you need to apply antibiotic ointment, such as erythromycin, Bactrim to treat the symptoms. It is also possible that men have underlying diseases, such as immune deficiency, diabetes leading to local fungal infections can also have white material formation, a local secretion smear examination of the glans can confirm the diagnosis. If there is a fungal infection, the primary disease should be controlled and antifungal treatment should be carried out at the same time, which can be cured. If men have unclean sex and women have vaginitis, local infection, such as mycotic vaginitis in women infecting men’s glans, will also appear white material on the foreskin, which needs to be treated between husband and wife to be completely cured.