There are no special symptoms in the early stage of small intestinal tumors, and discomfort may occur, such as abdominal pain, abdominal mass, gastrointestinal bleeding and other symptoms. 1. Abdominal pain: it is usually due to the fact that small intestinal tumor cells will invade into the abdomen and make it irritated, thus abdominal pain occurs. 2. Abdominal lumps: it is usually due to the fact that the small intestine mainly absorbs nutrients, and under the stimulation of tumor cells, there is an absorption obstacle that causes accumulation, which in turn causes the phenomenon of abdominal lumps. 3. Gastrointestinal bleeding: it may be due to the rupture of small intestinal mesenchymal tumors, or due to the abnormal defecation habit or change of regularity, which leads to the rupture of submucosal blood vessels in the gastrointestinal tract, and then gastrointestinal bleeding occurs. Small intestinal tumors may also have symptoms such as change of stool properties, fever, anemia, emaciation, etc. However, since the early symptoms are not obvious, generally these symptoms may have already reached the middle or late stage, therefore, if you have any discomfort, you need to go to the hospital in time for checkup and early discovery and early treatment, so as to avoid delaying the condition and having adverse consequences.