Methods of holding urine quickly include drinking a lot of water, taking furosemide tablets orally, and injecting saline into the bladder after placing a catheter. 1. If the patient does not have kidney or gastrointestinal diseases, he can drink a lot of water in a short time and then exercise appropriately. Through the filtering effect of the kidneys, a large amount of urine can be produced to achieve the effect of holding urine quickly. 2. Oral furosemide tablets, spironolactone tablets and other diuretic drugs or intramuscular furosemide injection can produce a large amount of urine in a short period of time to achieve the effect of rapid urine holding. The medication should be applied under doctor’s supervision. 3. After placing a catheter, saline can be injected into the bladder through the catheter to fill the bladder quickly. In the clinic, this method is sometimes used to quickly diagnose the disease through ultrasound, abdominal CT and other tests after the bladder is quickly filled. Patients need to consult the doctor for examination and early treatment if they feel unwell.