Why do I urinate frequently every day?

Urinating is a product of biological metabolism and a necessary process to maintain life. Human urination follows certain rules, and the amount of urine excreted each day is basically constant. If the difference is large, it means that there is a functional problem. For example, why do some people urinate many times a day? Let’s take a closer look at this issue.

Urinating 4 to 6 times during the day and 0 to 2 times at night is called frequent urination. Frequent urination can be physiological, psychoneurological, or a symptom of many diseases. There are many causes of frequent urination, including inflammation, foreign bodies, mental factors, physical weakness after illness, parasitic diseases, etc.

(1) Increased urine volume When urine volume increases, the frequency of urination will also increase accordingly. Under physiological conditions, such as drinking a lot of water, eating watermelon, and drinking beer, due to the increase in water intake, the amount of urine increases through the regulation of the kidneys, and the frequency of urination also increases, resulting in frequent urination. Under pathological conditions, such as some patients with diabetes and diabetes insipidus, they drink a lot of water, urinate a lot, and urinate frequently, but they do not feel any discomfort when urinating.

(2) Inflammation stimulates the bladder. When the bladder is inflamed, the urinary urge center is in an excited state, resulting in frequent urination and reduced urine volume. Therefore, frequent urination is an important symptom of cystitis, especially in acute cystitis and tuberculous cystitis. Other conditions such as prostatitis, urethritis, pyelonephritis, chronic balanoposthitis in children, and vulvitis can also cause frequent urination. Under the stimulation of inflammation, frequent urination, urgency and pain often occur at the same time, which is called urinary tract irritation syndrome, commonly known as "triuria".

(3) Certain factors of urinary dysfunction, such as prostatitis, can cause excessive contraction of the urethral sphincter, leading to bladder outlet obstruction and residual urine formation, causing urine to flow back into the prostate, which can not only bring in pathogens but also directly stimulate the prostate, inducing sterile "chemical prostatitis", causing abnormal urination and pelvic pain. Many patients with prostatitis have a variety of urodynamic changes, such as decreased urine flow rate, functional urinary tract obstruction, detrusor-urethral sphincter dyssynergia, etc.

(4) Non-inflammatory irritation, such as urinary stones and foreign bodies, usually presents with frequent urination.

(5) Reduced bladder capacity, such as bladder space-occupying lesions, tuberculous bladder contracture, or large bladder stones.

(6) Psychoneural urinary frequency only occurs during the day or before falling asleep at night. It is often caused by mental stress or occurs in patients with hysteria. This may also be accompanied by urinary urgency and pain.