In a rare medical case, parasitic worms grew underneath a woman's upper eyelid.

A Thelazia infection, called Thelaziasis, can “cause mild to severe signs and lesions, such as foreign body sensation, ...

Some people assume worms come to the surface so they do not drown in their burrows. However, "worms don't have lungs like we ...

The World Health Organization estimates over a billion people are infected with parasitic worms. The implications are often serious and lifelong. NPR spoke with Francisca Mutapi, a professor of ...