The causes of intestinal blockage are gallstone blockage, intestinal roundworm blockage, and some are fecal stone obstruction, as well as special foods. Gallstone blockage is special, caused by gallstones entering the intestine. If smaller stones may be excreted with feces, if they are larger, with a diameter of 2.5 centimeters or more, they may cause blockage, especially in the ileum, which accounts for 60-80% of intestinal blockage because it is the narrower part of the intestinal canal. Ileal blockage occurs mostly in children, where roundworms proliferate in the intestine, and when affected by certain factors, strong stimulation causes roundworms to twist into clusters with each other and easily block the intestinal cavity. There are also examples of fecal stone obstruction, which is common in elderly people with poor digestion, or in patients with severe paralysis, weakness, and inability to defecate. Special foods, such as black dates and persimmons, will form gelatinous substances after meeting stomach acid, which will easily block the intestinal cavity.