There are more reasons for patients to have dry mouth and bitter mouth in the morning, and the common ones are as follows: 1. diabetes: if blood sugar is a problem, it may cause symptoms of dry mouth and bitter mouth; 2. thyroid disease: if patients have hyperthyroidism, hyperparathyroidism and other diseases, it leads to dry mouth and bitter mouth; 3. metabolic endocrine diseases: if patients have lesions in the adrenal glands, such as pheochromocytoma, it can produce symptoms of dry mouth and bitter mouth in the morning; 4. symptoms of dry mouth and bitter mouth when getting up; 4. Urogenital disorders: because the human body keeps excreting urine, body fluids are in a state of loss, which can bring about obvious manifestations such as bitter and dry mouth; 5. Rheumatic immune diseases: such as dry syndrome, because the glandular secretion function of the human body happens to be obviously abnormal, and there can even be no tears, in addition to the reduced secretion of oral mucous membrane glands, there will be other parts of the glandular secretion problems, such as vaginal The problem of the secretion function of the mucous membrane can also lead to dry mouth and bitter mouth symptoms; 6. Gastrointestinal diseases: If lesions occur in the gastrointestinal tract, such as Helicobacter pylori infection, cholecystitis, bile reflux and other diseases, there is also dry mouth and bitter mouth performance.