Black spots on the glans are generally considered to be caused by glans eczema, lichen planus or fungal infectious skin disease. When this happens, it is recommended that patients go to a regular male or urology or dermatology clinic in a timely manner and undergo further examination to clarify the diagnosis and carry out symptomatic treatment. It may also be caused by long-term chronic inflammatory stimulation, especially in patients with long foreskin, because the glans folds of the foreskin easily hide dirt, easy to be infected by streptococcus, Escherichia coli, Candida albicans, trichomonas, chlamydia, mycoplasma, fungi, gonorrhea, etc., stimulating local changes in the foreskin and mucous membrane. Depending on the situation, you can choose to take oral antibiotics or apply topical anti-infective creams to the affected area and observe the recovery of the condition. During the treatment period, attention should be paid to avoid sexual intercourse and keep the external genitalia clean and dry.