Urination may be caused by drinking too much water, or it may be caused by diabetes mellitus, uremia and other diseases, please consult the doctor in time to find out the cause. 1. Physiological factors: drinking too much water, soup, drinks will have the symptoms of excessive urination, urine volume, this is due to the intake of water caused by the normal phenomenon, do not need to worry too much. 2. Diabetes mellitus: diabetes mellitus patients with elevated glucose levels in the urine will lead to osmotic diuresis, which in turn leads to urinary polyuria, urine volume, the patient is mainly manifested as polydipsia, polyphagia, polyuria, weight loss, a series of symptoms. 3. Uremia: Uremia is a disease caused by antidiuretic hormone deficiency, or renal insensitivity to antidiuretic hormone, patients with this disease have impaired renal tubular reabsorption of water, so there will be symptoms of polyuria, large urine volume, in addition, the patient will also be irritable, thirst, drinking a lot of water, hypotonic urine and other manifestations. If the symptoms of polyuria and large urine output persist without relief after physiological factors are excluded, early medical consultation should be sought to avoid delay.