In general, drinking a lot of water and frequent urination is a relatively normal phenomenon, but we can not rule out some pathological conditions. Under normal circumstances, a large number of drinking water will lead to a rapid increase in circulating blood volume in a short period of time, the body in order to maintain internal balance, the filtration rate of the kidney as well as the discharge of water will be a large number of increases, which occurs when the frequency of urination is a normal phenomenon. However, frequent urination after drinking a lot of water can not exclude the following pathologic conditions: 1. Inflammation: when there is inflammation of the urethra, there may be frequent urination, accompanied by urinary urgency, urinary pain and other symptoms; 2. diabetes mellitus: when suffering from diabetes mellitus, drinking a lot of water will lead to a decrease in reabsorption in the kidneys, and frequent urinationi may also occur; 3. stones: when kidney stones are present, they can also irritate the urethra, bladder and other organs, causing frequent urination; If the condition persists, it is recommended to seek medical attention at a regular hospital to find the cause.