Dry mouth and tongue to eat fruit will be good possible reasons are physiological factors, bad habits, systemic diseases. 1. Physiological factors: mainly in the middle-aged and elderly and menopausal women, this period of the body’s various systems of function, metabolism, low or temporary disorders, there will be mild symptoms of dry mouth and tongue. 2. Bad habits: such as sleeping with the mouth open to breathe, resulting in excessive salivary volatilization, causing dry mouth; large amounts of alcohol caused by benign hypertrophy of the parotid gland leading to a decline in secretion, etc., can lead to a decrease in the amount of saliva, thus causing dry mouth. 3. Systemic diseases: such as dry syndrome, because the immune response to destroy the parotid gland, resulting in impaired function of the salivary glands in the oral cavity, salivary secretion is reduced, resulting in intolerable dry mouth and tongue. There may be other reasons for dry mouth and tongue, if you continue to have dry mouth and tongue, it is recommended to consult a doctor in time, after a clear diagnosis of the correct treatment, to avoid delays in the condition.