The main reasons for increased urination are increased water intake, taking medication, acute kidney injury, diabetes and so on. 1. Increased water intake: urine is an excretion of the body that is mainly water and contains a variety of inorganic salts, uric acid, oxalic acid and other substances. When the normal population daily water intake is too much, it will lead to a decrease in plasma crystal osmolality, increase blood volume, reduce tubular reabsorption, at this time there will be an increase in the amount of urine. 2. Taking drugs: If the patient has recently been taking diuretic drugs such as hydrochlorothiazide, furosemide, spironolactone, etc., all the above drugs have diuretic effect, which can lead to increased urine output. 3. Acute kidney injury: the condition is caused by the patient’s recent presence of severe diarrhea, acute bleeding and other conditions, or he or she suffers from atherosclerosis, glomerulonephritis and other underlying diseases, resulting in a short period of time due to rapid decline in kidney function. Patients in the early stage of the onset of oliguria or even anuria, with the recovery of the condition will enter the polyuria period, the daily urine volume can reach 4000-6000ml. 4. Diabetes mellitus: the cause of diabetes mellitus is still unclear, clinically considered to be related to genetic factors, viral infections, the patient’s own immune system defects and other factors. The disease will cause patients to drink more, urinate more, eat more and weight loss symptoms, which will lead to symptoms of increased urine output. In addition to increased urination caused by drinking, there are a variety of clinical diseases that can lead to increased urination, and it is recommended that the patient first consult a doctor for examination to determine the specific cause of the disease.