How to hold urine for the longest time

How to hold urine for the longest time? 1. This problem is unscientific, because holding urine is harmful to our body. After holding urine, it is easy to cause urinary tract infection. After holding urine, bacteria are easy to retrograde infect the urethra or bladder, causing inflammation of the bladder and urethra. Because we regularly discharge urine, at the same time, some bacteria and bacterial metabolic products can be excreted, thus reducing the possibility of infection. But if we hold urine for a long time, it is easy to provide a culture medium for bacterial infection, which is easy to cause infection. 2. Long-term urine retention is easy to cause urine reflux into the kidneys, causing hydronephrosis, or pyelonephritis showing fever. Because long-term urine retention bladder mucosa will absorb some toxins, causing bladder mucosa to show malignant change, so we do not advocate long-term urine retention.