Foreign body sensation on the right side of the sternum may be caused by foreign body inside the throat, new organisms on the right side of the throat, esophageal cancer and so on. 1. Foreign body: foreign body sensation on the right side of the sternum may be caused by foreign body inside the throat, for example, there are fish splinters and date kernels stuck inside the throat. 2. Pharyngeal neoplasm: foreign body sensation on the right side of the sternum may be related to the right side of the pharyngeal neoplasm, right tonsil polyp, pharyngeal polyp, right epiglottis neoplasm, right pyriform fossa neoplasm and so on, all of which can induce patients to have the manifestation of foreign body sensation on the right side of the sternum of the pharyngeal neoplasm. 3. Esophageal cancer: foreign body sensation on the right side of the sternum may be related to esophageal cancer, which is a kind of malignant tumor in the upper digestive tract, and the typical symptom is progressive dysphagia, and foreign body sensation on the right side of the sternum may occur. Patients with foreign body sensation on the right side of the sternum after swallowing saliva are recommended to go to the hospital in time for consultation and standardized treatment according to the doctor’s instruction after clarifying the cause of the disease.