Early symptoms of abdominal tumors are often not obvious and may vary from abdominal pain, bloating, nausea, vomiting and blood in the stool. Different abdominal tumors have slightly different symptoms. 1. Colon cancer: Early symptoms of colon cancer are often inconspicuous, which are often manifested as changes in bowel movement traits and habits, such as alternating constipation and diarrhea, difficulty in defecation, etc., and may be accompanied by abdominal distension, abdominal pain, blood in stool and other symptoms. 2. Liver cancer: Early symptoms of liver cancer are relatively insidious and may include decreased digestive function, pain in the liver area if liver cancer invades the liver peritoneum, and acute abdominal pain in some ruptured and bleeding liver cancers. 3. Gastric cancer: Early symptoms of gastric cancer may include indigestion, acid reflux, belching, hidden pain in abdomen, fatigue and other clinical manifestations. Early symptoms of abdominal tumor have different manifestations, and some patients may not have obvious early symptoms. If abdominal tumor is suspected, it is recommended that patients should consult the hospital in time, have a detailed examination under the doctor’s guidance according to their condition and make a clear diagnosis so as to avoid delaying their condition.