Pregnant women have dry mouth once they go to bed, mainly due to dry indoor air, insufficient water in the body, eating too salty or too spicy, elevated hormones, open-mouth breathing, diabetes, dry syndrome, hyperthyroidism during pregnancy, abnormal secretion of antidiuretic hormone and other factors lead to the need to give the appropriate treatment and treatment according to the specific circumstances. Common causes and treatments a, environmental factors indoor air dry easily lead to pregnant women sleep on the dry mouth, can be used sterile air humidifier or put a pot of water indoors to humidify the air to avoid air dryness. Second, dietary factors 1, the body is not enough water: pregnant women can increase the appropriate amount of water, such as drinking too little water, you can consume porridge, soups and other supplemental water; 2, eating too salty or too spicy: before going to bed to eat too salty, too spicy and other heavy foods, you can have a dry mouth. Pregnant women during pregnancy should pay attention to avoid eating spicy, stimulating diet, it is advisable to eat light, easy to digest low-salt diet, eat more fresh vegetables. Third, pathological factors 1, elevated hormones: after pregnancy, by the body of estrogen, resulting in nasal mucosa, throat and other dry. Pregnancy to be able to drink more water to relieve the symptoms of dry mouth, after the end of pregnancy, will relieve the symptoms of dry mouth; 2, open-mouth breathing: some pregnant women because of obesity, rhinitis or other reasons to open their mouths to breathe, thus feeling dry mouth. In this case, try to change the nose to breathe, if you can not change the way of breathing, you can choose the open-mouth breathing corrector, to correct the phenomenon of open-mouth breathing during sleep, in addition, attention should be paid to keep the indoor air moist, thus indirectly alleviating the symptoms of dry mouth; 3, diabetes: pregnant women suffering from diabetes, there can be a dry mouth and other symptoms. Should go to the hospital in a timely manner, under the guidance of the doctor will be through the adjustment of diet, such as controlling the intake of fruits, will be controlled in a reasonable range of blood glucose, if the blood glucose is still high, can be injected with insulin to ease the blood glucose, due to glucose-lowering drugs will lead to fetal malformations, so you can not take it; 4, dryness syndrome: it is a mainly involved in exocrine glands, chronic inflammatory autoimmune disease, there is currently no cure for this disease, mainly Measures to improve symptoms, control and delay the progress of tissue and organ damage and secondary infections. Pregnant women with dry syndrome should eat less and more meals in daily life, drink more water, soy milk, porridge and other foods that can replenish water, keep the humidity of the living environment in a comfortable range, less blowing wind, the use of air conditioning, to avoid dryness that causes discomfort; 5. Hyperthyroidism in pregnancy: Due to the influence of hormone concentration in pregnancy, the body’s metabolism is hyperactive, and the system is highly excitable, which leads to Dry mouth, it is recommended to go to the hospital in time, under the guidance of the doctor for standardized treatment, such as taking antithyroid drugs propylthiouracil, to stop the secretion of thyroid hormones, receptor blockers, such as propranolol, can alleviate the symptoms of hyperthyroidism caused by panic, dry mouth and so on; 6, antidiuretic hormone secretion abnormalities: hypothalamus, pituitary secretion of antidiuretic hormone abnormality, which in turn leads to dry mouth. At this time, water intake should be restricted and hyponatremia should be corrected.