The reason why the male glans is red but not painful is not itchy: 1, poor personal hygiene, the local presence of more foreskin scale, urine scale, etc., long-term chronic stimulation can lead to local redness of the glans, while physical examination, visible around the red parts there is more dirt, the majority of patients are accompanied by circumcision or prepuce. It is recommended to do a good job of local personal hygiene, and for patients with long foreskin or circumcision, circumcision is recommended. 2, bacterial glansitis or glansitis caused by fungi, trichomonas, etc., can lead to local redness, and early on there is no obvious pain, but with the further aggravation of the infection there can be local erosion, exudation, pain, etc. It is also recommended to have a relevant pathogenic test, early medication to avoid further aggravation of the infection. 3, if there has been excessive frequent masturbation, or the presence of local mechanical stimulation, friction, etc., can lead to local skin redness, but generally not accompanied by obvious pain and itching symptoms. It is recommended that patients who have masturbated stop masturbating, change their cotton underwear and keep the local ventilation.