What causes frequent urination at night?

Frequent nighttime urination may be caused by physiological factors or pathological conditions such as benign prostatic hyperplasia (BPH) and cystitis. The specific analysis is as follows:

I. Physiological Factors

If a person consumes excessive amounts of water before bedtime, or eats fruits and vegetables with high water content, the body's fluid volume may increase significantly. The excess fluid is then excreted through urine, which may lead to this symptom. This is considered a normal physiological phenomenon.

II. Pathological Factors

1. Benign Prostatic Hyperplasia (BPH)

In older patients, reduced levels of androgens due to aging can lead to impaired prostate function, resulting in abnormal proliferation of local cells and enlargement of the prostate gland. This enlarged prostate compresses the bladder. At night, the brain's inhibitory signals weaken, reducing the constraining force of the urethral sphincter, thereby causing frequent urination. It is recommended to take medications such as Qianlieshutong Capsules or Tadalafil Tablets under a doctor’s guidance.

2. Cystitis

Poor personal hygiene and failure to clean the genital area regularly may result in accumulation of dirt in the folds of the penis and foreskin, promoting bacterial growth. These bacteria can invade the urethra and travel upward to the bladder, causing an inflammatory response and leading to cystitis. Persistent stimulation from inflammatory factors triggers involuntary bladder contractions, resulting in this symptom. Treatment may include antibiotics such as Cefixime Capsules or Minocycline Hydrochloride Capsules, taken according to medical advice.

In addition, pyelonephritis may also cause this condition. It is advisable to reduce fluid intake before bedtime to avoid disrupting sleep quality.