Urinary retention refers to the bladder is full of urine but can not be discharged, there will be poor urination, frequent urination and other symptoms, but clinically there is no clear indication of how much urine is urinary retention, the two are not too related. Urinary retention is usually caused by the patient’s urethra with foreign bodies, stones, tumors and other lesions, and may also be caused by congenital urethral deformity or suffering from prostate hyperplasia, prostate tumors and other diseases. Patients may experience symptoms such as poor urination, frequent urination, and incomplete urination. Some patients may experience symptoms such as swelling and distension in the lower abdomen because the bladder is full of urine and cannot be emptied. There is no correlation between the amount of urine and urinary retention, and it is not possible to diagnose urinary retention by the amount of urine, if you want to clarify whether you are suffering from urinary retention. If you want to know whether you have urinary retention, you can go to the doctor for relevant examinations, such as physical examination, laboratory tests and imaging tests. If you are diagnosed with urinary retention, it is recommended that you follow the doctor’s instructions for regular treatment to avoid delays.