When erosion of the foreskin occurs, then the foreskin infection is considered, and it is recommended to further clarify the cause of the infection and then treat it. Possible causes: 1, bacterial infection caused by erosion. Treatment requires the use of potassium permanganate diluted cleaning, cleaning, external application of erythromycin ointment or Pepto-Bismol ointment, 2-3 times a day, 3-5 days of continuous external application, to observe whether the erosion has improved. If the degree of erosion is more serious, you can take cefixime capsules orally, twice a day, for three consecutive days. 2, if it is a fungal infection, except for erosion, and can even be accompanied by erythema of the glans, herpes, or visible white secretion, etc.. Then it is recommended to use sodium bicarbonate solution for cleaning, after cleaning, external application of miconazole ointment, to observe whether the erosion has improved. 3, trichomonas infection can also cause the foreskin, glans erosion, it is recommended to use metronidazole solution. After cleaning, keep the local dry, and oral metronidazole tablets two tablets, twice a day, five consecutive days of oral, observe whether the symptoms have improved.