Symptoms of carditis include foreign body sensation, stagnation, distension and pain behind the sternum, chest distension and tightness. 1. Consciousness of the presence of a foreign body in the stomach when swallowing food, and the position is fixed without change, usually the symptoms are mild and intermittent. 2. Stagnation or stagnation: when swallowing food, one feels that the food is stagnating in a certain part of the body, which is usually persistent, and the symptoms are gradually obvious with the development of the disease. 3. Consciousness of post-sternal distension or slight pain, mostly intermittent, due to the peristalsis of the esophagus itself, which is obvious when the peristalsis reaches the site of the lesion. 4. Chest distension or constriction with dryness of the throat, usually with tightness in the chest, as if there is a foreign body blockage, resulting in tightness of the chest, which is more obvious when swallowing food. 5. Fullness and light pain in the fossa of the heart, subxiphoid process or epigastrium, with intermittent attacks. If the above symptoms occur, it is recommended to go to the hospital in time for early and regular treatment.