The foreskin has ulcers to consider the presence of foreskin infection, it is recommended to go to the hospital for relevant examination to further clarify. First, acute bacterial circumcision, can appear local erosion, accompanied by pain, redness and swelling, after the erosion surface can form ulcers, need to carry out bacterial smear examination, clear etiology after anti-infection treatment. The second, ring ulcerative circumcision, can appear superficial foreskin ulcers, ulcers around the white secretions, need to carry out local secretion examination, clear etiology after anti-infection treatment. Third, when there is a fungal or trichomonas infection, there can also be a vesicular ulcer, the ulcer is superficial, the surface can be accompanied by exudation, and at the same time, you can see the foreskin or glans local erythema, around the erythema there are changes of herpes. It is necessary to carry out fungal or trichomonas-related examinations to clarify the cause and then give symptomatic treatment. Fourth, local trauma, local burns, and ulcers can also appear, mostly accompanied by a clear history of trauma and burns.