Worms sometimes causes spasms or convulsions.
Worms live in the gastrointestinal tract or burrow from that tract into the muscles.
There are several types of parasitic worms which can live in human intestines, including tapeworms, hookworms, pinworms, whipworms, and roundworms. The degree of infestation is determined, upon examination, by the type, size, and number of worms found. They irritate your intestinal lining, and reduce even more the amount of nutrients which are absorbed into your bloodstream. The worms also produce toxic waste which is harmful to your body. Scratching the anus will transfer worm eggs on your fingers to anything else you touch.