Drinking a lot of water and still being thirsty is not good for the heart and you need to consult the endocrinologist and cardiologist. Drinking a lot of water and still being thirsty may be due to elevated blood glucose levels. When blood glucose is elevated, the concentration of solutes in the glomerular filtrate rises, which carries away a large amount of water, making a person feel thirsty and therefore drink a lot of water. Therefore, it is necessary to visit an endocrinologist so that the presence of a disease such as diabetes mellitus can be clarified. Diabetic patients with long-term higher-than-normal blood glucose can develop cardiovascular complications, such as coronary artery disease, which can cause chest tightness, palpitations and other discomforts, and therefore require a cardiology consultation for further clarification and diagnosis and treatment. Drinking a lot of water is still thirsty but also difficult to recommend timely consultation to avoid delays in the condition.