The redness and swelling of the edge of the glans, may be the foreskin is slightly long, the edge of the glans wrapped, inflammation and infection caused by the swelling, there may also be redness. It is recommended to turn the foreskin, with water to clean the foreskin glans, and then local application of erythromycin ointment, or gentamycin ointment, 2-3 days will be significantly improved. You can also use 1:5000 potassium permanganate dilution solution soak, each soak 3-5 minutes, 1 time in the morning and evening. Through such treatment, the redness and swelling will be obviously improved in 2-3 days. Usually do not squeeze too much, pay attention to hygiene, you will avoid swelling.