Coughing with phlegm after eating is considered to be an irritating cough caused by chronic pharyngitis. Chronic pharyngitis is mostly caused by repeated episodes of acute pharyngitis, which can cause symptoms such as dry throat, itchy throat, foreign body sensation in the throat, sore throat, irritating cough and increased sputum. Chronic pharyngitis is caused by Yin deficiency in the internal organs, and the false fire is disturbed, it is advisable to nourish Yin and clear heat, not to use Western medicine anti-inflammatory, it is recommended to take oral Chinese medicine such as dandelion tablets and golden voice and throat pill to clear heat and remove fire. You can also take Slowly and easily or take Niuhuang Yijin tablets, the effect is good. If the lymphatic follicles in the throat wall are enlarged, they can be treated with microwave cautery or plasma cryoablation. In addition to medication, diet and environmental factors are also important. You should stop smoking and drinking, avoid spicy food, and stay away from the stimulation of dust. The presence of GERD cough and sputum should also be considered. 24-hour esophageal PH monitoring and esophageal mechanics examination can be performed to identify the cause.