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Causes
By Mayo Clinic staffBlepharitis is often a chronic condition that can affect the outer portion of your eyelid where the eyelashes attach (anterior blepharitis) or the inner portion of your eyelid that comes into contact with your eye (posterior blepharitis).
Conditions associated with blepharitis include:
- Seborrheic dermatitis — dandruff of the scalp and eyebrows
- A bacterial infection
- Malfunctioning oil glands in your eyelid
- Rosacea — a skin condition characterized by facial redness
Blepharitis may be caused by a combination of factors. Less commonly, blepharitis may result from allergies or even an infestation of lice on the eyelashes.
