Urethral discharge is a symptom of urethritis, mostly accompanied by urinary frequency, urinary urgency, urinary pain and other urinary tract irritation symptoms, most of them are caused by unclean sex, or personal reproductive hygiene, as well as women with vaginitis, men with glansitis, bacteria retrograde from the urethra into the urethra, common pathogenic bacteria such as Escherichia coli, Staphylococcus aureus, gonococcus. The bacteria retrograde from the urethra into the urethra will invade the urethral mucosa, thus causing urethral congestion, edema, inflammatory secretions, the formation of pus from the urethral orifice outflow, can be presented as cream, yellow, yellow-green and other colors, mostly accompanied by urinary frequency, urinary urgency, urinary pain and other urethral irritation symptoms. If it is gonococcal infection, it is considered to be directly related to unclean sexual contact. If it is E. coli or Staphylococcus aureus, it is considered to be related to personal reproductive hygiene and other reasons. It is necessary to use sufficient amount of sensitive antibiotics for treatment in a timely manner, and generally the pus will disappear in about 3 days of treatment and heal in about a week. During the treatment period, pay attention to a light diet, prohibit spicy and stimulating food, drink more water, and urinate regularly. To sum up, pus from the urethra is mainly caused by urethral infection, and is directly related to unclean sexual contact, personal reproductive hygiene, local inflammation of the urethra, etc.