Itching when urinating, it is recommended to go to the hospital for examination, the possible causes are as follows: 1, non-gonococcal urethritis: is due to mycoplasma, chlamydia infection, the infection can be accompanied by symptoms of itching in the urethra, and accompanied by burning in the urethra, or there is always a small amount of discharge in the urethra. The discharge is yellow or white, thin, and can crust, dry, and paste the urethra, and can be accompanied by symptoms such as frequent, urgent, and painful urination. Patients often have unclean sexual contact, it is recommended to carry out relevant tests for mycoplasma and chlamydia, and give symptomatic drugs for treatment after diagnosis; 2, gonorrhea: infected with gonococcus through unclean sexual contact, there will be itching in the urethra, accompanied by pain, accompanied by a large amount of yellow purulent discharge from the urethra, and accompanied by frequent urination, urinary urgency, stinging pain in urination and other symptoms. A gonococcal culture and gonococcal smear test are needed to confirm the diagnosis and give symptomatic medication. The disease can also be transmitted through sexual contact, so sexual intercourse should be avoided during treatment.