It is recommended to go to the hospital for further examination to clarify the possible causes: 1. Local infections of the external genitalia, such as fungal or bacterial, can cause local itching symptoms. It is also possible to have local redness and swelling or increased secretions, mostly caused by poor local personal hygiene or contact with pollutants, and requires a detailed physical examination or local bacterial smear test to further confirm the diagnosis. 2. The presence of urinary tract infections can cause local itching, accompanied by frequent urination, urinary urgency and painful urination. Urethritis can cause redness and itching around the urethra along with abnormal urination. The actual fact is that you will need to have a routine urine test, a urine culture test, and a physical examination around the urethra to further confirm the diagnosis.3. Non-infectious factors, such as glansitis and circumcision in men, are most often seen when the foreskin is too long or there is a circumcision, and there is more circumcision and urine scale locally, or usually do not pay attention to personal hygiene, resulting in more local dirt. Long-term chronic, physical stimulation can produce symptoms of itching and pain.