Nausea with phlegm in the throat can be seen in acute pharyngitis, but also in nasal diseases, chronic pharyngitis, chronic bronchitis and other diseases. 1. Acute pharyngitis: viruses, bacteria, mycoplasma and other infections of the organism may trigger acute pharyngeal disease, cough, sore throat, phlegm, nausea and other clinical manifestations. 2. Nasal diseases: Nasal inflammation is common in allergic rhinitis, chronic rhinitis, chronic sinusitis and other diseases, due to the backward flow of nasal mucus, can cause irritation to the throat, the formation of phlegm more and nausea symptoms. 3. Chronic bronchitis: this disease can lead to more phlegm, coughing up through the throat leads to mucous phlegm adsorption in the posterior wall of the pharynx, phlegm viscous not easy to cough up, nausea and other manifestations. The symptoms of phlegm in the throat with nausea, it is recommended to consult a doctor in a timely manner to clarify the cause of the disease and then actively treat it.