Throat congestion and edema with foreign body sensation is likely to be chronic pharyngitis, tonsillitis, pharyngeal tumors. 1. Acute pharyngitis: due to the pharyngeal mucosa stimulated by risk factors, mucosal congestion and edema, lymphoid follicular hyperplasia, resulting in a foreign body sensation in the throat, occasionally itchy, burning sensation, pharyngeal mucosal secretion increases, irritating cough, mostly in colds, cold aggravated. 2. Tonsillitis: the main discomfort in the throat, tonsil congestion and edema can be observed, accompanied by coughing, coughing up phlegm and other symptoms. 3. Pharyngeal tumor: swallowing is affected, serious obstruction of esophagus and airway can be caused, which can be observed with the help of laryngoscope. The cause of this symptom should be clarified after examination by a specialist.