PATHOLOGY

Detailed explanation-1: -Nail biting can also transfer pinworms or bacteria buried under the surface of the nail to your mouth. When bitten-off nails are swallowed, stomach problems can develop.

Detailed explanation-2: -Accidentally swallowing or breathing in pinworm eggs causes a pinworm infection. The tiny (microscopic) eggs can be carried to your mouth by contaminated food, drink or your fingers. Once swallowed, the eggs hatch in the intestines and mature into adult worms within a few weeks.

Detailed explanation-3: -You have to see the eggs or worms to make the diagnosis. The best way to do this is by doing a tape test. In the morning, before your child goes to the bathroom or washes up, put the sticky side of a piece of clear tape around the anus. Remove the tape and look for pinworms or their eggs.