Patients with genital erosion may be caused by syphilis, genital herpes, malignant tumors and other causes. 1. Syphilis: Syphilis is a chronic sexually transmitted disease caused by syphilis spirochete infection. When patients develop stage II or stage III syphilis, it may lead to pustules, ulcers, erosions and other conditions in the genital organs, and some of the patients also show systemic symptoms, such as headache, vomiting, lethargy, and unresponsiveness. 2. Genital herpes: genital herpes is caused by herpes simplex virus infection of the genitals and perianal skin and mucous membranes, patients have no obvious self-conscious reaction in the early stage of the disease, with the development of the disease, the patient’s genitals will appear around the blisters, vesicles, or ulcers, accompanied by itching, burning sensation, and pain and other symptoms. 3. Malignant tumor: common malignant tumors include penile cancer, glans cancer, etc. When malignant tumors appear in patients’ genital area, it may cause penile swelling, penile rupture, red plaque, papule and ulcer on the head of penis, and in serious cases, it may cause erosion of genital organs and so on. It is recommended that patients seek medical examination in time to clarify the cause of the disease and then carry out targeted treatment, pay attention to personal hygiene in life, keep the private parts of the local clean and dry, avoid unclean sex during the recovery period, do a good job of monitoring the condition, regular review, and so on.