If you are still thirsty after drinking more water, it is recommended that you go to the endocrinology or stomatology department of a regular hospital for a relevant examination to clarify the cause and then treat the symptoms. If you are still thirsty after drinking more water, it is recommended that you go to a hospital for a systematic examination, mainly to investigate two common diseases, namely diabetes mellitus of the endocrine system and salivary gland diseases of the oral system. One of the typical symptoms of diabetes is excessive drinking, so diabetic patients may feel dry mouth even after drinking a lot of water. It is also important to consider the presence of oral diseases, such as salivary gland duct stones, salivary gland damage or tumors, which can cause this symptom. After clarifying the cause of thirst after drinking a lot, patients are advised to undergo standardized treatment under the guidance of a specialist, and active treatment of the primary disease can help improve the symptoms. Patients are advised to pay attention to maintaining oral hygiene and use artificial saliva if necessary, as well as to control diet and increase exercise.