A 13-year-old boy always clearing his throat is considered to be suffering from reflux pharyngitis, tonsillitis, post-nasal drip syndrome and other diseases. 1. reflux pharyngitis: diet too sweet, too much exposure to allergens, excessive smoking and alcohol, physical fatigue, mental stress and other factors may induce gastric contents reflux into the pharynx pharyngitis, resulting in a 13-year-old boy always clearing his throat, there may also be sore throat, dry and itchy and other symptoms. 2. Tonsillitis: If you suffer from acute pharyngitis, rhinitis and other diseases, the inflammation of neighboring organs spread to the tonsils, may induce tonsillitis, so that 13-year-old boy always clear throat; may also be accompanied by fever, sore throat and other symptoms. 3. Postnasal drip syndrome: If you suffer from rhinitis, nasal polyps, sinusitis and other diseases, may lead to nasal inflammatory secretion backflow, induced postnasal drip syndrome, so that the 13-year-old boy always clear throat, but also may appear coughing, foreign body sensation in the throat and other symptoms. 13-year-old boy always clear throat, may also be caused by bad habits, etc., it is recommended that the patient to the hospital to diagnose and treat the cause of the disease and follow the doctor’s instructions for corresponding treatment.