Intestinal colic is caused by the intense and intermittent contraction of the smooth muscle of the intestinal wall, which is the most common condition of acute abdominal pain in children. For infants, intestinal colic can be understood from the degree and intensity of crying. In typical cases, the site of abdominal pain is often around the umbilicus, that is, the site of spasm is in the small intestine. When the proximal large intestine is spasmodic, the pain is located in the lower right abdomen; when the distal large intestine is spasmodic, pain occurs in the lower left abdomen; if the child has abdominal pain before defecation, it may be due to spasm of the descending colon or sigmoid colon.
A few older children may experience colic in the rib area, which is more common on one side, due to spasm of the hepatic flexure or splenic flexure of the colon. Younger children may also have colic in the abdominal area below the sternum, which is due to spasms of the stomach. Strictly speaking, this is not intestinal colic, but stomach colic, but because the mechanism of occurrence is similar, massage therapy is also effective.
The possible causes of intestinal spasm may be improper diet (such as consuming a large amount of cold and raw food, overeating, overfeeding, or food with a high sugar content causing intestinal gas accumulation, etc.), leading to intestinal spasm; it may also be due to climatic changes (such as catching a cold and feeling cold) causing children to have intestinal spasm; or it may be due to the stimulation of intestinal parasite toxins. The above-mentioned triggering factors may cause transient ischemia of the intestinal wall or lead to sympathetic nerve excitation, causing the smooth muscle of the gastrointestinal tract to spasm, thus causing abdominal pain. When the smooth muscle of the gastrointestinal tract spasm, it can prevent the contents of the gastrointestinal tract from passing through, which may cause vomiting. After the smooth muscle of the gastrointestinal tract spasm for a period of time, it will gradually relax naturally, at this time, the child's abdominal pain will disappear, forming what is called 'attack interval'. If the pathogenic factors are not eliminated, the child may have abdominal pain again.