The feeling of choking at the bottom of the throat may be caused by esophageal cancer, pharyngeal swelling, laryngitis and so on. 1. Esophageal cancer: Cancer in the upper esophagus near the entrance of esophagus can cause the symptom of feeling something choking under the throat. 2. Swelling in the throat: it is mostly seen in epiglottis cyst, tonsil cyst, papilloma of tonsil, etc. It may also be malignant tumor, for example, laryngeal cancer, and the symptoms will be obvious with the gradual increase of the swelling. 3. Pharyngitis: Congestion and swelling of the mucous membrane of the throat caused by acute and chronic pharyngitis can lead to the feeling of choking on something under the throat. If you feel something choking under your throat, you should go to the ENT department of the hospital in time and get a clear diagnosis after a systematic examination.