Male urethral opening becomes small, if it does not affect urination and no other symptoms, do not have to do special treatment; external damage caused by the choice of urethral expansion treatment, infection can take ofloxacin and other drugs treatment. 1. Physiological factors: due to individual differences in the appearance and size of the male urethra, if the urine can be discharged smoothly, and there is no urinary symptoms such as frequent urination, urgency, etc., there is no need to do special treatment. 2. external injury: if there is a history of external injury, resulting in a small urethral opening, affecting the smooth discharge of urine. It is recommended that the patient go to the urology department, according to the size of the opening, with a urethral probe for urethral dilatation treatment. 3. Urinary tract infection: after the emergence of local infection of the urethral opening, resulting in the appearance of inflammatory enlargement, while some of the urethral opening is relatively small, you can follow the doctor’s instructions to take levofloxacin, cephalexin and other drugs to alleviate the treatment. Male urethral opening becomes small may be caused by a variety of factors, need different treatment methods, if it affects normal urination, timely to the regular hospital consultation and examination, treatment under the guidance of the doctor, strive for early recovery.