Causes of eyelid inflammation include allergy, bacterial infection, side effects of medication, a malfunctioning oil gland, and eyelash mites or lice, according to Healthline. Doctors cannot always determine the cause of eyelid inflammation, since many factors either cause the condition contribute to its cause.
Dandruff and allergic reactions usually cause anterior eyelid inflammation, which occurs on the outside of the lid near the lashes, explains Healthline. A malfunctioning oil gland in the eyelash follicles typically causes posterior eyelid inflammation, which affects the inner corner of the eyes. Symptoms of eyelid inflammation are varied and include itchiness, swelling, redness, burning and oiliness.