Is holding urine for a long time good for kidney function?

Kidney function is a very important function of the body. In addition to excreting metabolic waste from the body, it also shoulders the important task of balancing and stabilizing the body's electrolytes such as sodium, potassium, and calcium. The strength of kidney function can be judged based on some characteristics. For example, people with good kidney function are in good spirits and have sharp ears and eyes, while people with poor kidney function have frequent urination at night, often feel dizzy, have back pain and weak legs. So, does holding urine for a long time mean good for kidney function?

Sometimes, less urine is even considered a sign of good kidney function, but the habit of holding urine is very harmful to the body. In addition to the risk of bladder rupture, there are also the following hazards:

1. Impaired bladder function. When holding urine, the amount of urine in the bladder usually reaches more than 800-1000ml. Consciously holding urine for a long time exceeds the autonomous contraction range of the bladder detrusor muscle, which will disrupt the nerve function controlling bladder contraction, weaken the tension of the bladder detrusor muscle, and cause urinary retention or filling incontinence.

2. Induce urinary syncope or cause cardiovascular and cerebrovascular diseases. Sudden forceful urination after holding urine for a long time can cause over-excitement of the vagus nerve, insufficient blood supply to the brain, and a slowing of the heart rate, thereby inducing urinary syncope. For patients with hypertension and heart disease, holding urine will excite the sympathetic nerves, leading to high blood pressure and accelerated heartbeat, which may cause cerebral hemorrhage or myocardial infarction, and even lead to sudden death.

3. Induce prostatitis. Chronic prostatitis troubles many men. Studies have shown that an important cause of prostatitis is that bacteria from the urinary tract retrograde through the prostatic duct to the prostate and cause infection. If you often hold your urine, you will not be able to flush out the bacteria, increasing the risk of prostatitis.

4. Cause urinary tract infection. Frequent urination is not only beneficial for the excretion of metabolic products in the body, but also has a self-cleaning effect on the urinary system. If you hold your urine for a long time, the urine will not be able to flush away the bacteria living in the urethra, causing a large number of bacteria to accumulate in the urinary tract, which may cause urinary tract infection and induce cystitis, urethritis, pyelonephritis, etc.