Urethral infection is also known as urethritis, and the main symptoms of urethritis include frequent urination, urinary urgency, painful urination, and itching and pus in the urethra. Individuals with urethritis may also experience systemic symptoms such as fever, fatigue, chills, body aches, nausea and vomiting, and may also experience difficulty urinating. UTI is mostly a sexually transmitted disease, mainly due to retrograde infection through the urethra urethral injury, urethral stenosis as well as a foreign body in the urethra and other causes. UTI usually can not be self-tested, must go to the regular hospital for blood routine, urine routine and urethral secretion examination to confirm the diagnosis of urethritis. If a patient is diagnosed with UTI, he should go to a specialized hospital in time for the above tests to confirm the diagnosis, and take active treatment and use medication under the advice of a doctor.