Anterior blepharitis is further subdivided into staphylococcal blepharitis and seborrheic blepharitis, which is the result of dandruff of the scalp and eyebrows. These bacteria are commonly found on face and lids. But if they become excessive or the lid area reacts poorly to their presence, an infection may occur. Anterior blepharitis can also occur due to infestation of demodex folliculorum, a type of mite that is usually found on the eyelids and lashes. Posterior blepharitis can occur when meibomian glads irregularly produce oil. This creates favorable environment to bacterial growth. Posterial blepharitis can also develop as a result of other skin conditions, such as rosacea and scalp dandruff.