Blepharitis (ble-fa-ri-tis) is a condition of the eyelids.
Both the upper and lower eyelids become coated with oily particles and bacteria near the base of the eyelashes. It may cause irritation, itchiness, redness, and stinging or burning of the eye. Often, this condition occurs in people who have a tendency towards oily skin, dandruff or dry eyes. Blepharitis also is associated with meibomitis, which is inflammation of the nearby oil glands of the eyelids (called meibomian glands).