A small part of the colon resection has little effect on normal life, but a larger part of the colon resection will affect the normal absorptive function, there is a risk of infection, and a complete resection requires a stoma, etc. 1. Impact on normal absorption function: the digestive function of the large intestine is limited, mainly absorbing water and sodium as well as residual nutrients. Partial resection will affect the absorption of water, resulting in excessively thin and unshaped stools. 2. Risk of infection: the large intestine is full of bacteria, and after resection the surgical wound is exposed to bacterial environment, there is a certain risk of infection. 3. Increased frequency of bowel movements: As the colon becomes shorter, the amount of fecal matter stored decreases, leading to increased frequency of bowel movements. 4. Complete resection requiring a stoma: If all of the colon is removed, or if the resected end cannot be anastomosed patients are unable to defecate through the anus and need to use a stoma bag for defecation, which may have an impact on their lives. For the need for colectomy patients need to make the appropriate psychological preparation for the pros and cons of the operation need to be clear, after the resection will not affect the normal life, need to maintain a calm state of mind, and actively cooperate with the doctor’s treatment.