Cardia incontinentia, also known as cardia spasm and megaesophagus, is an esophageal dysmotility disorder associated with neuromuscular dysfunction caused by lesions in the musculocutaneous plexus of the esophageal cardia. It is characterized by spasticity of the lower esophageal sphincter, lack of normal peristaltic waves in the body of the esophagus, and the inability of food to pass through the cardia into the gastric cavity as normal, resulting in significant dilatation of the esophagus due to obstructed emptying. The disease can occur at any age, mostly in young and middle-aged patients aged 20-50, more women than men, and rarely in children. Clinical manifestations: 1. Difficulty in swallowing. The earliest symptom is painless dysphagia when eating, with intermittent episodes, often triggered by mental irritants associated with the onset, or by eating irritating foods such as too cold and spicy foods. 2. Pain. The pain is mostly behind the sternum, upper abdomen or under the glabella, and also in the back of the chest, not necessarily related to diet, sometimes occurring at night, and mostly spontaneous. 3.Vomiting and food reflux. Vomiting and reflux phenomenon after eating, vomiting and food reflux are related to the change of body position. 4. Malnutrition, emaciation and dehydration. It is related to the long-term difficulty in swallowing and vomiting that affects the intake of food and loss of water. Therefore, it is easy to diagnose as esophageal cardia cancer. Complications of cardia failure include malnutrition, esophagitis, ulceration and bleeding, and in some cases, cancer of the esophageal cardia.