The symptoms of early stage esophageal cancer are atypical and easy to be ignored. The main symptoms are retrosternal discomfort, burning sensation, pins and needles or pulling pain, and slow passage of food with stagnant sensation or mild choking sensation. Early symptoms may be mild or severe, and the duration of symptoms may vary, or may even be asymptomatic. Because the symptoms are atypical and may or may not be present, most patients fail to pay attention to them and delay them until the middle or late stages. But as long as non-medical friends master these basic knowledge, more care for their own body, the early diagnosis of the disease is still very helpful. 1.Posterior sternal distension or mild pain This symptom does not occur continuously, but indirectly, or is aggravated after exertion and rapid food intake. This is because the human esophagus is supposed to be peristaltic at all times and the symptoms will only appear when the peristaltic movement reaches the site of the lesion. 2.Foreign body sensation when swallowing food During the swallowing process, food, especially dry and hard food, may produce a foreign body sensation after passing through the lesion area, and it is often fixed in one part. Because the symptoms are mild and occur intermittently, it is also easy for patients to neglect. 3.Sensation of stagnation or stuttering when swallowing, i.e., the patient seems to have a feeling of stagnation and stuttering in a certain area when swallowing food, which is not continuous and only gradually becomes obvious after the development of the lesion. 4. Chest distension or constriction and often accompanied by dryness in the throat. The patient complains that there is always a stuffy phenomenon in the front of the chest, which seems to be blocked by an object and makes the chest feel constricted, especially when swallowing food, but it does not affect normal life and work. 5, subxiphoid or epigastric fullness and light pain The symptoms are more pronounced when eating dry food, but they do not occur every time, but intermittently. The occurrence of this condition is often an early symptom of cardia cancer.