CA724, also known as gastric cancer antigen, is a laboratory marker for detecting gastric cancer and various cancers of the digestive tract, and is also a non-specific tumor marker. It is relatively sensitive to gastric cancer, ovarian mucinous cystic adenocarcinoma and non-small cell lung cancer, as well as to biliary system tumors, colorectal cancer and pancreatic cancer. If a single item is high, it usually has no clinical significance and does not necessarily mean that one has a tumor. However, do not take it lightly. It is safest to do ultrasound, gastroscopy, colonoscopy, etc. If no obvious abnormality is found, it is safest to review again after three months. Normally, you should pay attention to rest, combine work and rest, ensure sufficient sleep and avoid staying up late. Eat lightly, quit smoking and alcohol. Keep your mood happy and avoid mental tension.