A “gas string-like” lump in the abdomen is a symptom of colon cancer. Colon cancer is mostly seen in middle-aged and elderly people, with more men than women aged 30-69. Early symptoms are not obvious, but the common symptoms in middle and late stage patients include abdominal pain and GI irritation, abdominal mass, change in bowel habits and stool characteristics, anemia and symptoms caused by chronic toxin absorption and intestinal obstruction and intestinal perforation, etc. Prevention of abdominal “gas string-like” masses: 1. Regular checkups People with high risk of colorectal cancer, such as men over 40 years old, patients with familial polyps, patients with ulcerative colitis, patients with chronic schistosomiasis and people with family history of colorectal cancer should have regular checkups to be alert to signals and early symptoms of colorectal cancer, such as changes in stool habits, diarrhea, constipation, alternating bowel movements, and other symptoms. Alternating diarrhea and constipation, blood in stool or black stool, flattening and thinning of stool shape, etc. 2.Improve dietary habits Reasonable arrangement of daily diet, more fresh fruits and vegetables and other foods rich in carbohydrates and coarse fibers, and appropriately increase the proportion of coarse grains and mixed grains in staple foods, which should not be too fine and refined. Change the habit of meat and high-protein food as the main food. Eat less high-fat food, especially to control the intake of animal fat. Therefore, the carcinogenic substances produced by high-fat, high-protein and low-fiber diet are more and act on the large intestine for a long time, which will certainly lead to an increase in the incidence of colorectal cancer. Therefore, eat less or no food rich in saturated fat and cholesterol, including: lard, butter, fatty meat, animal offal, fish roe, etc. Limit vegetable oil to about 20-30 grams per person per day (about 2-3 tablespoons). Eat no or less fried foods. Moderate consumption of foods containing unsaturated fatty acids, such as olive oil, tuna, etc. Take 35 grams or more of dietary fiber daily. Eat more foods rich in dietary fiber: konjac, soybeans and their products, fresh vegetables and fruits, seaweeds, etc. Replace fine grains with some coarse grains. Eat more fresh vegetables and fruits to supplement carotene and vitamin C. Eat walnuts, peanuts, dairy products, seafood, etc. in moderation to supplement vitamin E. Pay attention to the intake of malt, fish, mushrooms and other foods rich in trace elements of selenium. 3, active prevention and treatment of intestinal diseases, active exercise Prevention of various polyps, chronic enteritis (including ulcerative colitis), schistosomiasis, chronic dysentery, etc., for intestinal polyps should be dealt with more early. Colon polyps are divided into five categories, namely adenomatous polyps, biochemical polyps, inflammatory polyps, misshapen polyps, etc. Among them, adenomatous polyps are true neoplastic polyps, a precancerous lesion of colorectal cancer, so when adenomas are found in the colon, treatment should be carried out to remove the adenomas and pathological examination, hopefully at the stage of benign adenomas are removed to prevent colorectal cancer. If not treated early, most of them will become colorectal cancer and the prognosis is poor. In addition, habitual constipation should be actively treated, and attention should be paid to keeping the bowels open.