Bowel sounds half a month after colon cancer surgery is normal. In the short term after surgery, the intestine has not recovered, and transient blockage will be formed, and the gas in the intestine will peristalsis in the intestine, so it will cause bowel sounds. You can continue to observe for a period of time, pay attention to adjust the diet. If the phenomenon of intestinal tinnitus does not improve, you can further check whether there is obstruction. Under normal circumstances, after completing colon cancer surgery, the patient’s intestines will have slight intestinal tinnitus symptoms, but the patient will not feel more obvious intestinal tinnitus, which lasts for half a month or one month, and still exists, it can be considered that the tumor recurrence causes obstruction, and it needs to be further diagnosed, and relevant examination can be carried out, such as CT, ultrasound and so on, and the appropriate way of treatment can be chosen based on the results of the examination. If the tinnitus exists half a month after colon cancer surgery, it is recommended to go to the hospital in time and follow the doctor’s instruction.