The reason for this is that the glans is red, but not painful or itchy: 1. there is glansitis, in the early stages of inflammation can appear red, but not accompanied by obvious pain and itching, but with the further progress of inflammation, there can be local pain and swelling, erosion and other reactions. 2. if there is a prepuce or circumcision, the glans is wrapped by the foreskin for a long time, which contains a little urine scale or foreskin scale, etc., can The actual pain and itchiness of the glans can be a major problem.