Patients suffering from oral dry syndrome thirst in the case, this is a body immune disease, the main table body water content will be reduced, now for dry cornea, conjunctiva plus salivary gland atrophy, recurrent parotid gland enlargement, dry mouth, no saliva, always drink water or dry mouth, caries suddenly increase, often secondary to Candida infection, aggravate dry mouth symptoms, dry syndrome is A more serious systemic disease, unexplained bacterial infection, vision loss and interstitial lung fibrosis can occur. Patients should be advised to consult the rheumatology department. Patients with dry mouth need to pay attention to maintaining oral hygiene. Diabetes is due to the disorder of the body’s hormone levels, resulting in the body’s blood glucose levels rise, so there will be the phenomenon of thirst, and constantly drink water, there will still be thirst. When this happens, you should take sugar-lowering drugs to control the disease as soon as possible to avoid the phenomenon of thirst, if the symptoms of thirst worsen during the taking of drugs, it is likely that the disease has worsened, it is necessary to go to the hospital for examination before it is too late. People with hyperthyroidism also often feel thirsty because the thyroid gland synthesizes and releases too much thyroid hormone, which promotes metabolism and redox reactions in the body. This causes palpitations, increased eating and weight loss. Most patients also often have symptoms such as solid eye, eyelid edema and loss of vision at the same time. Also, taking certain specific medications can cause thirst, for example, taking antihypertensive drugs can cause dry mouth.