The normal color of the glans should be pink or purplish red, many men found that the glans color change, the emergence of black spots feel anxious, worried about a serious disease caused by the following introduction of common factors clinically caused by the glans black spots, as follows: 1, normal pigmentation, with the growth of age or aging of the skin, long-term adverse stimulation, pigmentation, as if Pigmentation in other parts of the body and spots on the face are the same, this situation is not to worry and generally does not require treatment. 2.Pigmented nevus can be caused by various factors such as nutrition, endocrine, skin lesions and bacterial and viral infections, etc. Generally, it can be observed, and if it continues to grow, it can be treated according to the situation. 3. Black spots on the skin of glans caused by bacterial, viral, mycoplasma and fungal infections and inflammatory stimulation, such cases need to be examined to find out the pathogenic bacteria and to carry out symptomatic treatment. 4, the glans skin mucosa is damaged, after repair can appear pigmentation appear black spots, this situation does not need treatment, observation can be. 5, some drug factors can lead to skin pigmentation, due to the long time drug stimulation, resulting in the glans black, black spots. In summary, inflammatory stimulation of the foreskin glans, physiological aging, bad medication, nutritional endocrine disorders, etc. can lead to glans darkening, black spot is a high incidence of male urinary tract infections, male friends should pay attention to, found in a timely manner to the hospital, check the diagnosis after regular treatment, so as not to delay the disease.