The solutions for anuria and oliguria are as follows: 1. Pre-renal factors: you can make up for the causative factors to enter the volume, such as patients taking antipyretic and analgesic drugs after a cold, sweating, anuria and creatinine increase, then a lot of water, their urine volume will be restored; 2. Post-renal factors: such as obstruction, stones, tumors or prostate hypertrophy and hyperplasia, after removing the obstruction, the patient’s urine will be discharged. In most patients with an enlarged prostate, urinary retention can be discharged by inserting a catheter urine. Both anuria and oliguria are more serious states, but anuria is more serious than oliguria. The absence of urine means that the urine is less than 100ml in 24 hours. If there is no urine discharge, toxins must be retained in the body, which can lead to toxin damage to all systems, so immediate treatment is needed. If a patient does not urinate for a day, he or she should go to the hospital immediately for emergency or inpatient treatment to identify the cause of anuria or oliguria, such as prenephrosis, postnephrosis or nephrosis, and to treat the cause.