Daytime not frequent urination at night frequent urination may be related to physiological factors, but also may be related to cardiac insufficiency, renal lesions and other factors. 1. Physiological factors: drinking too much water before going to bed may lead to daytime not frequent urination at night. Normally, we should pay attention to try to avoid the habit of drinking water before going to bed, and part of the population is mentally overstressed, which can lead to psychogenic urinary frequency, also prone to frequent urination at night. 2. Cardiac insufficiency: for people with cardiac insufficiency, lying down at night, the return blood volume decreases, leading to an increase in blood flow to the kidneys, and there may also be an increase in nocturnal urination. 3. Renal lesions: daytime not frequent urination at night may also be associated with chronic tubulointerstitial disease, chronic glomerulonephritis with severe interstitial lesions, and chronic renal insufficiency and other factors, mainly due to the patient’s renal concentrating function is reduced. There are more reasons for frequent urination at night without urinating during the day, and it is recommended to actively seek medical treatment after eliminating physiological factors so as not to delay the condition.