Human botfly larvae, for example, burrow under your skin, forming a pus-filled pimple. Meanwhile, thousands of young Loa loa worms can travel throughout your body —even across your eyeball!

Parasitic infections or worms can affect anyone, regardless of age or location. While often associated with unsanitary ...

The skin in these areas might look inflamed ... the eggs hatch in your intestines and grow into adult worms. Female pinworms move to your anal area to lay their eggs. This causes anal itching.