If cardia cancer always spits out mucus, it may be caused by the tumor blocking the cardia completely. The cardia cancer is located at the connection between the lower end of esophagus and stomach, with the increasing size of tumor, the tumor will block the cardia completely, and the cardia will be in the state of atresia, at that time, the mucus produced by the mouth and esophagus has no way to enter into the stomach, and after a long time of accumulation, the patient will have the situation of vomiting and spitting out mucus all the time. If cardia cancer always vomits mucus, it means that the patient has entered the advanced stage, and it is necessary to consult doctor in time to improve CT, MRI and other examinations, and according to the situation, adopt palliative surgical resection, local radiotherapy, chemotherapy and other treatments to shrink the tumor, improve the quality of life and prolong the life cycle.