The intestine is an important channel for food transmission, if there is a problem with the intestine, it will have a great impact on the body. What are the early symptoms of rectal cancer? Blood in stool Many patients who have blood in stool think that it is caused by small hemorrhoids and do not pay attention to it, but in fact, 80% of rectal cancer will have blood in stool, and serious cases will have sticky blood stool, but it is easy to be ignored by patients because it is common. 2, black stool In recent years, influenced by the trend of detoxification, many people abuse laxatives, which led to a significant increase in colon black stool disease, in fact, the common explanation is that the colon becomes black, the disease is accompanied by adenomatous polyps and intestinal cancer rate of up to 22% -55%. 3, diarrhea The occurrence of continuous change in stool habits, including sudden constipation, diarrhea or alternating between the two, as well as a significant increase in the number of stools, are some of the symptoms of rectal cancer. Dietary care of rectal cancer 1. Reduce the intake of fats and oils in the diet The relationship between diet and cancer is most studied in fats and oils, including saturated fats and unsaturated fats. Fats and oils in the diet can promote the growth of cancer cells, and can also cause normal cells to mutate early and turn into tumors. Both animal and vegetable fats should be reduced as much as possible. Excess fats, especially animal fats, can stimulate bile acid secretion in the small intestine. When the amount of bile acid in the intestine is too high, it can easily become carcinogenic and encourage the growth of cancer cells. Thus, high-fat diet is closely related to the occurrence of rectal cancer. 2.Increase dietary fiber intake Dietary fiber intake can reduce the incidence of colorectal cancer, probably because of the strong water absorption of dietary fiber, which can increase the volume of feces, make feces form, facilitate defecation, reduce the concentration of carcinogenic substances in the intestine, and thus reduce the risk of colorectal cancer. Therefore, under the premise of maintaining the same amount of staple food, replace fine grains with some coarse grains, such as konjac, soybeans and their products. 3.Intake of vitamins and trace elements The role of vitamins and trace elements should not be underestimated; eat more fresh vegetables and fruits to supplement carotene and vitamin C. Eat walnuts, peanuts, dairy products, seafood, etc. in appropriate amount to supplement vitamin E. Pay attention to the intake of malt, fish, mushrooms and other foods rich in trace elements of selenium. 4, drink more water Drinking more water can promote metabolism, discharge some waste and garbage in the body, the intestines also have certain benefits, so drink more water or good.