It is recommended to go to the hospital for relevant examinations to decide how to deal with the genitals turning red. First, if the genitals are red in the erect state, it is mostly caused by congestion. Generally, no treatment is needed, and the erection can be restored to normal after it disappears. Second, if there is a foreskin-related disease that causes local redness, it is recommended to use potassium permanganate solution for local external washing. After the external washing, keep the local area dry and apply a little Bactroban ointment 3 times a day for a week to observe whether the local reddening returns to normal. Third, if there is a local herpes plus genital reddening, mainly consider herpes virus infection caused. It is recommended to use acyclovir ointment topically 3-4 times a day for a week. And oral acyclovir 400mg 3 times a day for a week for treatment. Fourth, if the glans-related diseases appear genital reddening, need to carry out bacteria or fungus and other related examination. If it is a fungal infection, it is recommended to use sodium bicarbonate solution for local external washing, and after external washing, apply a little miconazole ointment 3 times a day for a week. If the infection is caused by bacteria, a little topical Bactrim ointment should be applied 3 times a day for a week.