Phlegm in the throat can be caused by acute tonsillitis, chronic pharyngitis, reflux pharyngitis and other causes, mainly by medication and other methods. 1. Acute tonsillitis: there can be a feeling of phlegm in the throat, mainly pain in the throat, foreign body sensation, often accompanied by high fever. Most of the cases are bacterial tonsillitis, usually with penicillin anti-inflammatory treatment, combined with blue scutellaria oral medicine and other proprietary Chinese medicine to clear heat and detoxification treatment. 2. Chronic pharyngitis: Chronic pharyngitis is also typically characterized by phlegm in the throat, foreign body sensation, accompanied by sore throat. It can be treated with Chinese patent medicines such as clearing throat granules and iodized throat tablets. 3. Reflux pharyngitis: characterized by hoarseness and foreign body sensation in the throat. The main thing is to inhibit the secretion of gastric acid such as omeprazole and promote gastric emptying such as domperidone. Phlegm in the throat may also have other causes, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, give targeted treatment or treatment. The above medication should be used in accordance with medical advice.