Bowel cancer surgery and then have a mass in the stomach, can choose surgical resection or radiotherapy, or no special treatment, need to be decided according to the nature of the mass. 1. Mass requiring treatment. Bowel cancer surgery may not be able to remove 100% of the cancerous tissues, and the remaining tumor cells will grow gradually. It is recommended that patients should go to the hospital at the first time when they find lumps after bowel cancer surgery, and improve the relevant examinations such as abdominal CT, MRI, or tumor markers, etc, to determine the nature of the lumps, and the doctors will choose radiotherapy or surgery for the lumps with recurrence of the cancer according to the comprehensive situation of the patients. 2. Masses that do not need special treatment. Generally speaking, surgical incisions and wounds will have tissue proliferation or scar repair after surgery. When the tissue proliferation is obvious, keloid may be produced, which is also a cause of postoperative abdominal mass. If it is a keloid after examination in the hospital, it usually does not need any special treatment, and it should be observed regularly in order to prevent malignant transformation of scar tissue. If there is a lump in the stomach after bowel cancer surgery, you need to consult the doctor actively and follow the doctor’s instruction for reasonable treatment to avoid delaying the condition.