If you have frequent urination at night, it is recommended that you go to the hospital for relevant examinations to clarify the possible causes: first, urinary system infection, after the infection can appear to have sudden urinary frequency, accompanied by symptoms of urinary urgency and pain. Patients with severe urinary frequency may even urinate once a few minutes, and each time the volume of urine is not much, so routine urinalysis and urine culture tests are needed to further confirm the diagnosis. Secondly, stones in the urinary system, especially stones in the lower part of the ureter, can cause pain in the lower abdomen, accompanied by obvious urinary frequency and urgency, accompanied by obvious symptoms of incomplete urination, often due to frequent contractions of the bladder stimulated by the stones at the end, further ultrasound or CT examination of the urinary system is needed to further confirm the diagnosis. Third, cold weather or drinking more water before going to bed can cause a transient phenomenon of frequent urination at night. All of these factors may lead to an increase in the amount of body fluids or a decrease in the effective bladder capacity, which may result in significant symptoms of nocturnal urinary frequency.