Urethral discharge can be classified as mucus, bloody, or purulent according to its nature. The mucus discharge from the urethral orifice is milky white and thick, seen in sexual excitement and chronic prostatitis. Urethral orifice purulent discharge is yellow and sticky, commonly seen in acute urethritis. Bloody discharge from the urethral orifice, which refers to blood mixed with mucus, is mostly seen due to urethral and genital tract infections. The examination of mucus urine due to acute urethritis: 1, secretion smear and culture gonococcus are negative, while smear microscopy, in the oil microscope (1000 times) field of view polymorphonuclear leukocytes more than 4 or morning urine, the anterior segment of urine 15 ml precipitation, in the high-power (400 times) field of view, polymorphonuclear leukocytes per field of view more than 15, has diagnostic significance. 2, conditions can be made Chlamydia trachomatis, Mycoplasma solium and other pathogenic tests, to facilitate the diagnosis. The diagnosis of urethritis is based on the history and signs, but the urethral secretions need to be stained with smear or bacterial culture to identify the causative agent. The Urethra is not to be examined with instruments in the acute stage. Chronic urethritis requires urethral cystoscopy to clarify the cause of the disease. Sometimes a metal urethral probe can be used to test for strictures in the urethra, and urethrography can be performed if necessary. Urethritis should first be distinguished from gonorrheal urethritis, which is an STD with specific infection, with purulent discharge from the urethra and Gram-negative diplococci in the lobulated nucleated granulocytes as seen on smear smear.