If a male patient has a black mole on the glans, the specific good or bad should be analyzed according to the patient’s specific situation. If it is due to the birthmark of the patient, and this kind of mole on the glans is not necessary to be too nervous, in this case belongs to the normal body structure of the patient, basically will not lead to bad disease, it is recommended that patients do not need to worry too much. If this kind of nevus grows later in life, in this case it is recommended that the patient must pay attention to it and it may be caused by pigmentation. However, it is also possible that the nevus is caused by local cancer of the glans, which is a bad situation. It is recommended that the patient must go to the hospital for relevant examination, such as pathological examination of the nevus, and if the nevus is caused by local cancer, it must be treated by surgery in time.