Itchy male sex organs are recommended to the hospital for examination to clarify the possible causes: First, non-gonococcal urethritis can cause symptoms of itching in the genital canal, often due to mycoplasma and chlamydia infections. Then there can be itching, burning, accompanied by frequent urination, urinary urgency and other discomforts, can also be accompanied by the presence of a small amount of secretion in the genitals. It is recommended to leave the secretion for mycoplasma and chlamydia detection, or leave the urine for mycoplasma and chlamydia detection. Second, gonococcal urethritis, it is due to gonococcal infection and lead to itching in the urethra, or symptoms of pain. It can be accompanied by a large amount of yellow purulent discharge from the urethra, usually after a history of unclean sexual contact, and is a sexually transmitted disease. Third, non-specific urethritis, when there is Escherichia coli, Klebsiella and other infections caused by urethral inflammation, there can also be itching accompanied by frequent urination, urinary urgency of the symptoms, need to carry out urine culture tests to confirm the diagnosis.