There are many reasons for coughing and phlegm after eating something. If it is caused by chronic pharyngitis, it can be relieved by medication (e.g. peppermint throat lozenges, etc.). If it is caused by gastroesophageal reflux disease (GERD), it can be relieved by medication (e.g. omeprazole, etc.). Specific analysis is needed. 1. Chronic pharyngitis: When suffering from chronic pharyngitis, ingested food can irritate the throat, thus leading to increased secretion. Gargle with compound borax solution, furacilin solution, compound chlorhexidine gargle, etc. can be used. You can also take mint throat lozenges. 2. Gastroesophageal Reflux Disease (GERD): When you eat something, the pressure inside the stomach increases, which can cause the stomach contents to reflux into the esophagus, pharynx, and airway, resulting in coughing, coughing up sputum and other symptoms. It is commonly treated with proton pump inhibitors such as omeprazole and gastric motility drugs such as mosapride. Coughing and phlegm after eating something can also be seen in other diseases, if the symptoms are not relieved or aggravated, it is recommended to consult a doctor in time to clarify the diagnosis and standardize the treatment, so as to avoid delaying the condition.