The actual glans rash need to go to the hospital for further examination to clarify the cause of the rash before treating it with the right medicine. If it is a bacterial glans, causing a red rash in the glans area, then you can apply topical antibiotic ointment, commonly used ointments are Bactrim ointment or erythromycin ointment, topical application for a week, and then observe whether the symptoms have improved. A fungal infection can also cause a red rash on the glans, so you need to apply topical miconazole ointment or clotrimazole ointment 3 times a day for 7-10 days to see if the symptoms are relieved. If you are suffering from trichomoniasis, you can also get a red rash on your glans, so you need to use metronidazole for local cleaning and then apply metronidazole gel topically after cleaning to see if your symptoms improve. If you have a sexually transmitted disease, you can also develop a red rash on the glans, and you need to identify the specific cause. If there is syphilis, then you need to use penicillin for intramuscular injection treatment, and topical medicine can choose potassium permanganate solution for local cleaning.