The first two wave types, P and S , are called body waves because they travel or propagate through the body of Earth. The latter two are called surface waves they the travel along Earth's surface and their amplitude decreases with depth into Earth.
The causes are many and can have bacterial infection, seborrheic dermatitis of the face or even a scalp, rosacea, allergies, and in very rare cases, the lice. If the itchy eyelids is brought about by seborrheic dermatitis then you may develop dry, flakey patches of skin on the eyelid.
Bacterial meningitis can be one of the causes of rash in eyelids. Nail Polish. Nail polish contains some ingredients that are harmful for eyes. Even a tiny speck of nail polish can cause rashes in eyelids. Contact Lens. Contact lenses often irritate the skin region in the eyelid. A skin irritation can give rise to swollen bumps and cause Eyelid Rash.