The phenomenon of nausea and vomiting when brushing teeth in early pregnancy should be considered in two ways: firstly, it is a normal reaction to pregnancy, especially in the first trimester, many people will have this early pregnancy reaction of nausea and vomiting, which can be significantly improved after the third trimester, and this does not require special treatment. The second consideration is that this nausea and vomiting is not directly related to pregnancy, but may be caused by other diseases such as chronic pharyngitis, the most typical manifestation of chronic pharyngitis is nausea and vomiting when brushing teeth, but rarely vomit out the stomach contents, usually a phenomenon of dry vomiting, promptly to the hospital otorhinolaryngology clinic, laryngoscopy can be clarified.