A red spot on the glans is painless and itchy and may be caused by pearly penile papules, condyloma acuminatum, syphilis and other diseases. 1. pearly penile papules: the etiology is not yet clear, may be local stimulation, physiological developmental abnormalities, poor hygiene habits, circumcision and other factors. Patients may appear in the coronal edge of the penis pearl-like, translucent pimples, color light red, no obvious symptoms, manifested in the glans grow a red spot painless and itchy. 2. Condyloma acuminatum: Condyloma acuminatum is caused by human papilloma virus infection, men can occur in the glans, lesions can be a single small light red particles in the early stage, the texture is soft, the tip of the tip of the tip is slightly sharp, no pain, no itching, and then rapid growth. 3. Syphilis: Syphilis is caused by syphilis spirochete infection, or considered to be induced by sexual impurity, low immunity and other factors. Patients can appear in the skin mucous membrane pimples, rash and other symptoms, some patients may appear glans grow a red spot painless itchy situation. There are many reasons that cause the glans to grow a red spot without itching, and it is recommended that patients identify the cause of the disease in a timely manner.