Hair may fall out after chemotherapy for colon tumors, and that treatment should be administered properly under the judgment of your doctor. Commonly used drugs for colon tumor chemotherapy include fluorouracil, oxaliplatin, irinotecan, capecitabine and so on. While these drugs kill cancer cells, they may also kill hair follicle cells, thus causing hair loss, but hair loss will improve after stopping chemotherapy. In addition to hair loss, chemotherapy may also cause adverse reactions such as loss of appetite, nausea, vomiting and limb pain. It is recommended that colon tumors decide whether or not to undergo chemotherapy at the judgment of the doctor. Chemotherapy for colon tumor can generally be divided into preoperative chemotherapy and postoperative chemotherapy. Preoperative chemotherapy is mainly suitable for recurrent or metastatic colon cancer, while postoperative chemotherapy is suitable for Stage II with high-risk factors as well as Stage III people.