Eyelid inflammation, also known as blepharitis, is a common condition that can cause redness, itching, burning, and flaking of the eyelids. It is often caused by bacterial or fungal infections, allergies, or an overgrowth of skin cells. STYE and STY are two common forms of eyelid inflammation. A STYE is an infection of the oil glands in the eyelid, while a STY is an infection of the sweat glands in the eyelid. Both conditions can be treated with antibiotics or other medications.