Many people get up early in the morning and brush their teeth with nausea and dry vomiting, there are two general causes of this phenomenon: symptoms of chronic pharyngitis: blood in the throat when you get up, nausea and dry vomiting when brushing teeth these are typical symptoms of chronic pharyngitis, the amount of bleeding when brushing teeth is related to the severity of the condition. If this is the case of nausea and dry vomiting, you should go to the hospital for examination and treatment as soon as possible. Improper way of brushing teeth and caused by: nausea is mainly caused by the stimulation of the toothbrush or toothpaste on the pharynx, especially people with more sensitive pharyngeal reflex or recent pharyngitis, coupled with unconscious breath holding when brushing teeth, increasing the sensitivity of the pharyngeal reflex and causing nausea reaction. A chronic pharyngitis treatment method often gargle with compound borax solution, furacilin solution, 2% boric acid solution, gargle with the head slightly back, open the mouth to make “ah ah ah” sound, so that the gargle solution can clean the back wall of the pharynx. You can take some throat tablets. Adhere to the morning and evening gargle with light salt water, gargle is also the head back, open mouth “ah” sound, after gargling, may wish to drink a glass of light salt water, mainly on the pharynx sterilization, cleaning and moistening, improve the pharyngeal environment, to prevent bacterial infection. Adhere to half a year a load, chronic pharyngitis in clinical symptoms can disappear. If the mucous membrane of the pharynx is congested and thickened, there is hyperplasia of submucosal connective tissue, mucus gland hypertrophy and secretion, you can try laser treatment, if the symptoms are serious, laser treatment should be carried out in stages; you can also use silver nitrate, freezing or ion therapy. Perform nebulization treatment. Second, how to avoid nausea and dryness caused by improper brushing Warm water brushing: many people brush their teeth, regardless of spring, summer, autumn and winter always use cool water. Brushing teeth with cool water is not good for teeth. On the one hand, when it is cold, brushing teeth with cool water can not make the toothbrush bristles soften, when brushing teeth inattentively will cause bleeding gums, causing nausea; on the other hand, brushing teeth with cool water (especially in winter) because of the water and oral temperature disparity, can stimulate the oral nerve cause nausea. Control the amount of toothpaste: when brushing teeth, do not squeeze too much toothpaste, generally depending on the toothbrush you use. Toothbrush bristles a little more, toothpaste accounted for 1/3 can; toothbrush bristles a little less, toothpaste accounted for 1/2 can. This will not cause waste and can avoid discomfort during the brushing process. Warm water soften toothbrush hair: spring, autumn, winter (especially winter) three seasons in brushing teeth, you can use 30-40 ℃ warm water (to adapt to their own appropriate), first put the toothbrush into it, to be toothbrush hair softened, and then squeeze on the appropriate amount of toothpaste to start brushing. This will not cause bleeding gums and you will not feel nauseous when you rinse your mouth with warm water. Nose out: When brushing your teeth, try to use your nostrils to breathe out, not your mouth to breathe in.