Most of the red spots on the glans are caused by glansitis of the foreskin, and the treatment is also based on external antibiotics and disinfection. Most of the circumcision is caused by long foreskin or circumcision, not paying attention to cleanliness. In addition, the sexual life without paying attention to cleanliness is also easy to cause bacteria and other infections. In addition to the redness and rash on the surface of the glans, itching or discomfort will also accompany the occurrence of glansitis. The redness and swelling of bacterial glans is most obvious. Treatment is generally internal and external. The external disinfection can be done with 3% boric acid water or 1:5000 potassium permanganate lotion for cleaning, which can be combined with oral antibiotic treatment. In addition, glans erythema can also be seen in allergy to condoms or underwear, generally after lifting the allergen symptoms will be relieved. In addition to treatment, prevention is also important. Men whose sexual partners have vaginitis or do not pay attention to cleanliness have a higher chance of developing glansitis. If you have a long foreskin or a foreskin that is not easy to clean, you should have a circumcision if necessary, which is generally recommended before puberty.