A few people will experience headache, nausea, stomach pain and other symptoms after taking intestinal worms, these symptoms do not need to be dealt with and will be eliminated on their own after some time. Intestinal worms belong to the anthelmintic drugs, this kind of drug has the effect of removing the parasites in the body. After taking intestinal wormers, the parasites will swim and scurry around in the body, and some of them will even twist into a ball, so some people will experience abdominal pain. Some people will have more parasites in their body, which will gather in a certain part of the body in clusters. After taking intestinal worm remedies, the intestinal tract may be blocked due to the gathering of worms in clusters, so abdominal distension, abdominal pain and other symptoms will occur. The pain in the stomach after taking intestinal worms usually only exists for a period of time, and after a period of time it will be eliminated naturally without any treatment. However, some people have more serious pain for a longer period of time, which may be due to the parasite passing through the papilla of the duodenum and entering the bile duct causing abdominal symptoms. Once this happens, you need to consult a doctor and get targeted treatment.