How will I know my child has pinworms?
If your child is infected with pinworms, he or she may frequently scratch his or her bottom. Your child may also move around a lot in bed at night or may not be able to sleep. The itching is caused by the female pinworm that comes out of the rectum to lay eggs around the anus (the opening to the rectum). The eggs stay in the upper part of the intestine until they hatch. After they hatch, the worms move down the length of the intestine, and then out the anus where they lay more eggs.
Sometimes tiny, white worms (shorter than 1/2 inch in length) may be seen on the child's bottom at night or they may show up in the child's stools.
Written by familydoctor.org editorial staff