Normal adults urinate 4 to 6 times during the day and 0 to 2 times at night, if more than this number is called frequent urination. Frequent urination can be both physiological, psychoneurotic, and one of the symptoms of many diseases. There are more diseases that cause frequent urination, including inflammation, foreign bodies, mental factors, post-illness deficiency, parasitic diseases, etc. Frequent urination after drinking a lot of water is a normal physiological phenomenon if the amount of urine is not less. After drinking a lot of water, the body absorbs water and excretes more than the water in the body through the kidneys, resulting in a short period of frequent urination, which usually disappears after controlling the amount of water drunk. However, if the frequency of urination occurs without drinking a lot of water and the volume of urine is small each time, accompanied by symptoms of urinary urgency, painful urination and incomplete urination, it is necessary to consider whether the frequency of urination is caused by inflammation of the urinary system, stones, tumors, etc. stimulating the bladder, urethra and prostate. The diagnosis needs to be clarified by relevant tests. To sum up, frequent urination after drinking a lot of water is a normal physiological phenomenon, which is the need to maintain the normal water balance of the human body by excreting too much water in the body in time.