in retention symptoms

Urinary retention is a common symptom in clinical practice, mainly due to some pathological changes causing bladder urination obstruction, urine in the bladder can not be discharged in time, so that urine remains in the bladder for a long time, causing lower abdominal pain and other manifestations, which is the symptom of urinary retention. Urinary retention belongs to urology emergency, due to excessive urine volume in the bladder will cause obvious pain, need timely treatment, general patients can drain urine through indwelling catheter to alleviate the symptoms caused by urinary retention, generally speaking, indwelling catheter drainage urine for the first time can not be too much urine volume, generally about 300 ml, if the first time the amount of urine discharged is too much, often will cause excessive contraction of the bladder, resulting in hematuria.