The symptoms of drinking too much water can be caused by two main reasons: physiological phenomena, as well as medical manifestations. Strenuous exercise, hot weather, and mental stress can lead to an increase in the body’s need for water, resulting in increased water consumption. Infectious diseases of the digestive tract are a common cause of such symptoms, such as bacterial enteritis, intestinal mucositis, and acute gastroenteritis. Infection of the digestive tract with pathogenic bacteria causes congestion and swelling of the mucous membrane in the stomach, intestines and other digestive organs, as well as functional disorders. When water in the body cannot be transformed and absorbed, it is excreted in the form of excretion, so an increase in water consumption may occur when there is a chronic lack of water in the body. However, it does not exclude that the patient has other systemic diseases such as diabetes, dry syndrome, stomatitis, etc. The specific cause of the disease requires an in-person visit to the hospital for examination before the diagnosis and treatment can be confirmed.