With a red rash on the glans, it is recommended that patients must turn the foreskin over every day and clean the foreskin, glans and coronal sulcus, which can prevent the rash from increasing further. You can also use 1:5000 potassium permanganate diluted solution for soaking. The main purpose of soaking is to control the inflammation and prevent further aggravation, once in the morning and once in the evening, for 3-5 minutes each time. You can also apply erythromycin eye ointment on the glans, once in the morning and once in the evening, usually 3-5 days the rash will be significantly reduced. If the patient has a red rash, itching sensation and a white membranous substance, it may be a mycotic infection, to use Dacrynic ointment in the local application, which can make the rash reduce until it disappears.