Normal people urinate 4-6 times a day during the day and 0-1 times at night. If the number of urination exceeds the normal value, it is frequent urination, which may be due to excessive water consumption or eating diuretic foods such as beer and watermelon, as well as women in pregnancy, due to uterine pressure on the bladder, resulting in bladder contracture, which can occur when lying down. These situations are caused by physiological factors, generally after adjusting the diet often can be relieved by themselves, and pregnant women can be relieved after delivery, without special treatment. However, frequent urination when lying down may also be due to mental factors as well as pathological factors: a. Mental factors: for example, abnormal psychological states such as mental tension and emotional excitement may cause abnormally frequent urge to urinate, that is, frequent urination when lying down may occur. It is recommended that such patients should usually pay attention to more rest, avoid drinking a lot of water before going to bed, and should pay attention to adjusting their mindset to avoid excessive emotional tension and excitement. Second, pathological factors: 1, urinary system diseases: if frequent urination when lying down, and also accompanied by the symptoms of each urine volume reduction, mostly seen in the inflammation of the urinary tract, especially acute cystitis, in addition to the lower ureteral stones, contracture bladder, bladder stones, bladder tumors, prostate hyperplasia and certain kidney lesions; 2, gynecological diseases: pelvic abscess, uterine fibroids, ovarian cysts, uterus Prolapse, etc., can cause frequent urination when lying down; 3, other: if lying down frequent urination and each urine volume is normal, it can also be seen in diabetes. It is recommended that patients go to the hospital in a timely manner and undergo urinary routine, urinary ultrasound and other related examinations to clarify the cause and treat the cause.