Possible Diseases That Cause Frequent Urination at Night
Frequent urination during the night, medically called nocturia, can be caused by various health conditions, including:

Chronic kidney failure

Diabetes mellitus (high blood sugar)

Diabetes insipidus (a disorder affecting water balance)

Enlarged prostate (benign prostatic hyperplasia, BPH) in men

Urinary tract infections

Heart failure

High calcium levels in the blood

Certain medications, such as diuretics (“water pills”)

Sleep disorders, including obstructive sleep apnea

Pregnancy

Bladder inflammation or overactive bladder syndrome

Other factors that can worsen nighttime urination include drinking excessive fluids, especially alcohol or caffeine, before bed, and stress or anxiety.

If frequent nighttime urination disrupts your sleep or daily life, or if you experience pain or burning when urinating, it is important to consult a healthcare professional for proper diagnosis and treatment