If you feel that your bladder is distended, but you do not have much urine, you will need further tests to identify the specific cause. First, when a urinary tract infection occurs, bladder mucosa congestion and edema can occur. At this time, the sensitivity of the bladder increases significantly, and when a small amount of urine is stored, it can produce an obvious feeling of holding urine and the need to go to urinate. However, because the urine stored in the bladder is too little, it is not possible to discharge more urine. It is recommended to keep urine for routine examination, and if infection exists, active anti-infection treatment is recommended. Second, chronic urinary retention, when the patient has weak contraction of the bladder forcing muscle, or there is a disease with urethral obstruction, such as urethral stones or prostatic hyperplasia, the bladder empties weakly and can discharge part of the urine, but there is still part of the urine remaining within the bladder. Over time, the more urine remains in the bladder, the more the patient will feel suffocated in the bladder. Because of the obstruction or weak contraction of the bladder’s forced urinary muscles, but unable to empty the bladder, the amount of urine discharged each time is small and accompanied by an obvious feeling of incomplete urination, it is recommended to perform ultrasound examination of residual urine to rule out the presence of chronic urinary retention.