Blepharitis is the term for inflammation located in the eyelids. This condition is caused by bacterial infections and skin disorders, including rosacea. In some cases, blepharitis can be caused by meibomian gland dysfunction (MGD). Patients typically experience irritation, itchiness, and redness with dandruff-like scales that form on the eyelashes. The inflammation may affect the inner or outer edge where the eyelashes attach.