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.
Symptoms And Causes Of Swollen Eyelid. Swollen eyelid is the swelling in the upper and lower eyelids of a person. Swollen eyed lids can also be a symptom of an other disease and medical conditions such as conjunctivitis. Periorbital puffiness is the name given to this condition.he treatment of swollen eyelids depends on the cause of it. When Stye is the cause then antibiotics can be used. Cold compression and artificial ear drops can be used for lowering the symptoms when conjunctivitis is the cause. Hot and cold compresses are more effective when the disease had occurred in the mild form.