Blepharitis is an inflammation of the eyelids, often causing redness, swelling, and irritation. It can affect the area where the eyelashes grow and may lead to crusty flakes at the eyelid margins. This condition can be caused by various factors, including bacterial infections, skin conditions like seborrheic dermatitis, or blocked oil glands. Symptoms of blepharitis may include itchy or burning eyes, excessive tearing, and a gritty sensation. Treatment typically involves good eyelid hygiene, such as warm compresses and eyelid scrubs, to reduce inflammation and remove debris. In some cases, medications may be prescribed to manage the condition.