No water at night or nocturia may be a normal phenomenon, dietary factors, etc. Pathological factors include psycho-psychological factors, prostate hyperplasia, diabetes mellitus, overactive bladder syndrome and other factors caused. 1. Normal phenomenon, dietary factors: nocturia 0-2 times is generally a normal phenomenon. If more than 2 times, and did not drink water before going to bed at night, but consumed a lot of fruit, fruit contains more water, will lead to the phenomenon of increased urination at night, is a normal physiological performance. 2. Psychological factors: for example, excessive mental tension during the night, easily induced by psychogenic urinary frequency, frequent urination at night, but the amount of urination is relatively small. 3. Prostatic hyperplasia: a common disease in older men, a benign lesion, the enlarged gland will cause bladder irritation, frequent urination at night, may also be accompanied by urinary difficulties, urinary weakness and other symptoms. 4. Diabetes mellitus: It may be related to heredity, poor dietary habits and other factors, which can lead to abnormal glucose metabolism in the body, and will result in frequent urination at night, accompanied by polydipsia, fatigue and other symptoms. 5. Overactive bladder: may be related to the lack of estrogen in the body, autonomic nervous system dysfunction and other factors, can lead to abnormal bladder function, frequent contraction, will be in the night frequent urination, accompanied by urinary urgency, urinary incontinence, serious cases can lead to urge incontinence. If you don’t drink any water at night and still have nocturia, and there are other abnormal manifestations, after excluding physiological factors, it is recommended to consult a doctor for examination and treatment.