In the early stage of esophageal cancer, foreign body sensation in the throat may occur, which is one of the symptoms of esophageal cancer in the early stage. Of course, the mere symptom of foreign body sensation in throat is not enough to prove that the patient has esophageal cancer. Diagnostic methods of esophageal cancer mainly include laboratory examination, molecular biology examination, clinical diagnosis, imaging examination, etc., of which the gold standard for confirming the diagnosis of esophageal cancer is histopathological examination. Early stage of esophageal cancer patients may not have obvious symptoms, while some patients may have stagnant feeling or slight obstruction when swallowing food, as well as dryness and constriction in the throat, and discomfort, pain or burning sensation behind the sternum. If patients have the above mentioned early symptoms of esophageal cancer, please go to hospital in time and actively cooperate with physicians for treatment.