Blepharitis is an inflammation of the eyelids that usually affects both eyes along the edges of the eyelids. Blepharitis often occurs when small sebaceous glands near the base of the lashes close, causing irritation and redness. Blepharitis is often a chronic condition that is difficult to treat. Blepharitis can be uncomfortable and inconspicuous. But it usually does not cause permanent damage to vision and is not contagious.
The symptoms of blepharitis are usually worse in the morning.
The exact cause of eyelid inflammation cannot always be determined, but various factors can increase the risk of blepharitis. For example, you may be at higher risk if you also have dandruff on your scalp or eyebrows. It is also possible to have an allergic reaction to makeup or other cosmetic products you apply around the eyes, which triggers eyelid inflammation. These are not the only possible causes. Treatment depends on the cause.