If the male urethra itches, the most direct cause is inflammation of the urethra, which is mainly due to bacteria, fungi, and pathogenic microorganisms such as Trichomonas vaginalis forming colonization in the urethral mucosa, triggering a series of symptoms, often in the presence of urethral itching along with clinical symptoms such as urinary frequency, urinary urgency, painful urination, and burning sensation in the urine, which requires ultrasound, urinary routine, bacterial culture, drug sensitivity test, etc., for diagnosis and differentiation Diagnosis. For patients with very difficult diagnosis, cystoscopy and urethroscopy can also be performed. In addition to urethral inflammation, allergy and foreign body irritation may also cause urethral pruritus. Detailed medical history needs to be taken, combined with auxiliary examinations to clarify the diagnosis and carry out targeted treatment.