What causes more urine when drinking water?

A drink of water on the urine is a normal physiological phenomenon. When drinking water, water will be absorbed into the blood through the digestive tract, so that blood volume increases, plasma osmotic pressure will decrease, resulting in reduced secretion of antidiuretic hormone, glomerular filtration of urine will increase, it will cause increased urination. If the patient shows signs of fatigue, polyuria, etc., diabetes can be considered and further examination is needed to confirm the diagnosis.