The common reasons for coughing up a foreign body in the throat are chronic pharyngitis, chronic tonsillitis, reflux pharyngitis and epiglottis cysts. 1. Chronic pharyngitis: due to chronic inflammation repeatedly stimulate the pharyngeal mucosa, resulting in mucosal congestion, edema, a small amount of secretion attachment, etc., which can be manifested as a foreign body sensation in the throat can not cough up and swallow. 2. Chronic tonsillitis: repeated stimulation of chronic inflammation can lead to tonsil congestion, swelling, tonsil mucosal tissue hyperplasia, etc., which can cause a foreign body sensation in the throat and coughing and swallowing. 3. Reflux pharyngitis: stomach acid reflux to the throat, the pharynx and throat mucous membrane caused by stimulation, can lead to phlegm in the throat can not cough up, can not swallow the feeling. 4. epiglottis cyst: due to the epiglottis mucosa mucus gland duct obstruction, so that mucus retention and the formation of cystic swelling, can also lead to the voice of foreign body sensation. Coughing up a foreign body sensation in the throat, can also be seen in other reasons, this situation, need to go to the hospital in time to identify the specific causes, and then according to the causes of targeted treatment.