The most likely cause of glansitis is that the woman has vaginitis that causes cross-infection during intercourse. It is recommended to wash it with warm water every night, or use gynecological cleansing, and apply erythromycin ointment or pepto bismol locally for treatment. It is best not to have intercourse during the treatment period. If a woman has a vaginal infection, she should be treated at the same time so that the next time she has intercourse, she should drink plenty of plain water and not eat spicy, stimulating food during the treatment period.