Coughing up phlegm in the throat may be due to pharyngitis, reflux esophagitis, acute respiratory tract infection, chronic airway disease, postnasal drip syndrome, etc., which needs to be treated with medicines such as watermelon cream tablets or surgery for the cause. 1. Acute or chronic pharyngitis: Acute pharyngitis or chronic pharyngitis leads to lymphoid follicle hyperplasia in the posterior wall of the pharynx, so this symptom appears. You can use compound boric acid solution to clean the oral cavity, compound iodine glycerin to smear the pharynx to inhibit the inflammatory reaction, and 20% silver nitrate solution to cauterize the lymphoid follicles. 2. Reflux esophagitis: gastric acid and other stomach contents reflux into the pharynx through the esophagus, corrosion and irritation of the pharyngeal mucosa and lead to this symptom. You can take omeprazole, bismuth pectin, domperidone and other drugs for treatment. 3. Acute respiratory tract infection: viral infection leads to acute inflammatory reaction of mucous membrane of upper respiratory tract and edema of mucous membrane of pharynx, so this symptom will appear. You can take Lianhua Qingdian capsule to treat the symptoms, combined with cough and phlegm medication such as compound dextromethorphan syrup and other drugs. 4. Chronic airway diseases: chronic obstructive pulmonary disease, chronic bronchitis, bronchial asthma, bronchial dilatation and other diseases when the airway inflammatory secretion increases, so there will be this symptom. It can be treated with budesonide, terbutaline, aminophylline and other drugs. 5. Postnasal drip syndrome: rhinitis, sinusitis and other diseases secretion backflow, stimulate the pharyngeal mucous membrane receptors, causing this symptom. Beclomethasone nasal spray, loratadine and other drugs can be applied. Pay attention to the use of drugs under the guidance of a physician.