The causes of dry mouth do not discriminate between men and women, but include damage to salivary glands, medication factors, neuropsychiatric factors, nutritional deficiencies and so on. 1. Damaged salivary glands: For example, dry syndrome, tumors, bacterial infections can lead to impaired salivary gland function, and insufficient liquid secretion by salivary glands can cause dry mouth. 2. Drug factors: for example, antihistamines, anticholinergics, antidepressants, diuretics, antihypertensives, etc. The side effects of these drugs can cause dry mouth, which will generally improve after stopping the drugs. 3. Psycho-neurological factors: for example, anxiety and nervousness can lead to endocrine dysfunction and reduce salivary secretion, resulting in dry mouth. 4. Nutritional deficiencies: for example, riboflavin deficiency can lead to dry mouth and xerostomia. Diarrhea, high fever, excessive blood loss leading to loss of body fluids can also appear dry mouth. Hot weather, sweat, body dehydration can cause physiological dry mouth. This condition will improve with more water and hydration. Do not eat spicy barbecue food when dry mouth occurs, do not blindly take medication, pay attention to the adverse effects of medication. If there is unexplained dry mouth for a long time, we should consult a doctor in time to avoid delaying the condition.