There are red spots on the glans but not painful or itchy then the possible causes: 1, suffering from glansitis, seen in bacterial infection, but also seen in mechanical physical friction stimulation, and the appearance of local erythema. In the early stage, there may not be any conscious symptoms, but with the further aggravation of inflammation can appear local exudation, erythema enlargement or obvious secretion with pain. It is advisable to carry out the relevant pathogenic tests, and after the diagnosis of glansitis, you need to carry out anti-infection treatment, and you need to maintain local hygiene and regular cleaning. 2. fixed drug rash, if oral allergy to some drugs or contact with some allergens, will appear glans fixed parts of the red spot. It can appear repeatedly, sometimes without any conscious symptoms, but sometimes with itching or with local oozing, and at the same time can be accompanied by similar red spots in other parts of the body, after the diagnosis needs to be anti-allergic treatment. 3, if suffering from prepuce or circumcision, then the prepuce can accumulate within the foreskin, long-term chronic stimulation can appear with red spots. The chronic period is generally not accompanied by any pain and itching symptoms, if the combined infection can be accompanied by pain or oozing.