Difficulty in swallowing is mainly due to the following reasons: 1. Diseases of the pharynx: such as epiglottitis, or a swelling in the pharynx or epiglottis, including benign or malignant, can cause difficulty in swallowing. 2. Diseases of the digestive system: such as a tumor in the esophagus, whether benign or malignant, can also cause corresponding difficulty in swallowing. Patients should first go to the ENT department and do a laryngeal endoscopy to check the larynx, so that they can visually see if inflammation has occurred in the epiglottis, or if there is a swelling in the throat. After otorhinolaryngology, we should go to gastroenterology for esophagogram or gastroscopy to rule out any tumor growth in the esophagus. No matter benign or malignant, if a mass growth is found during the corresponding examination, the doctor will take a pathological biopsy at the same time. Therefore, if you feel difficulty in swallowing, you must first consider the above problems and go to ENT or Gastroenterology to have an examination to make a diagnosis.