It is recommended to go to the hospital to check, clear the cause of the symptomatic drug treatment: if the bacterial infection caused by the circumcision caused by redness, this time you can use erythromycin ointment for treatment, the use of erythromycin ointment coated to keep the local clean, dry, the inflammation subsides after the redness can be subsided. But if the trauma or mechanical friction or allergy caused by redness and swelling, the use of erythromycin ointment can not play a therapeutic role, such as contact with allergens lead to local redness and swelling, this time the use of erythromycin ointment is ineffective, you need to use the anti-allergy ointment to deal with the symptoms. If the mechanical friction, such as excessive masturbation caused by the foreskin localized redness, stop the relevant stimulation of the cause of the redness can gradually subside, this time also do not need to use erythromycin ointment for treatment. If the examination is a fungal or trichomonas infection caused by the redness and swelling of the foreskin, the use of erythromycin ointment is also ineffective, you need to use antifungal or anti-trichomonas ointment to achieve therapeutic effect, so it is recommended to go to the hospital for further examination and then targeted medication treatment.