If the redness of the glans is caused by mechanical friction such as masturbation can be self-healing, it is not necessary to use erythromycin ointment. The redness of the glans is suffering from glansitis, mainly inflammatory changes of the glans skin mucosa, mainly painful discomfort, itching, redness, exudation, erosion, and discharge. It is necessary to use erythromycin ointment. While suffering from glansitis with erythromycin ointment, it is also necessary to do the following: to ensure sufficient sleep, light diet, drink more water, do not stay up late, emotional stability, plus turn up the foreskin, clean the glans with water and keep the glans dry. Local application of erythromycin ointment, 2-3 times a day, can promote the reduction of glans redness. If the glans redness and swelling, after applying erythromycin ointment, the condition subsides, there are recurrent episodes can also do circumcision.