Nausea and dry heaving when brushing teeth is generally considered to be caused by chronic pharyngitis, which can be relieved by general treatment and medication. 1. General treatment: quit smoking and alcohol, avoid dust and harmful gas stimulation, drink more warm water, light diet, avoid spicy and stimulating food stimulation. 2. medication: under the guidance of a doctor to use compound borax solution, furacilin solution for gargling, the use of watermelon cream tablets, iodine tablets and other drugs for treatment, if the chronic hypertrophic pharyngitis can also be used to 20% silver nitrate solution for the cauterization of hypertrophic lymphoid follicles, so as to achieve therapeutic effects. It is recommended to go to the hospital in time to avoid delaying the condition.