There are many causes of black spots on the glans, such as glansitis, external stimulation, hyperpigmentation, pigmented nevi and so on. 1. Glans inflammation: Inflammation of the glans caused by various pathogenic bacterial infections may cause localized black spots, rashes, pain, itching and other symptoms. 2. External stimulation: for example, extrusion by external forces, bruises can cause subcutaneous capillary rupture, which can also cause black spots on the glans. 3. Hyperpigmentation: Inflammation and allergy and other factors may also cause hyperpigmentation after the recovery of the disease, resulting in the appearance of black spots on the glans. 4. Pigmented nevus: for example, nevus pigmentosus, melanoma and other diseases, can also cause the symptoms of black spots on the glans. To summarize, there may be other reasons for black spots on the glans, and it is recommended to go to the hospital in time for examination to clarify the cause.