Blepharitis is an inflammation of the free edge of the eyelid which can spread to all eyelids. Blepharitis manifests itself by a redness and swelling of the eyelid, with small scabs on the skin and at the root of the eyelashes. It often affects both eyes at the same time, and is accompanied by pain or itching of the eyelids. Other ocular signs are often associated: eye redness, sensations of grains of sand, burning, itching and/or secretions.