Blepharitis: This condition is characterized by inflammation of the eyelids, leading to symptoms such as itchiness, dryness, and sometimes a gritty sensation in the eyes. It's a common condition that can be chronic and is often associated with other skin conditions like rosacea or seborrheic dermatitis.

Dry Eye Syndrome: A condition where the eyes do not produce enough tears or the tears are of poor quality, leading to dryness, itchiness, and discomfort in the eyes.
Allergic Conjunctivitis: An allergic reaction to substances like pollen, dust mites, or pet dander, causing itchiness, redness, and sometimes a watery discharge.
Eczema (Atopic Dermatitis): A chronic skin condition that can affect the eyelids, causing itchiness, dryness, and inflammation.
Contact Dermatitis: An allergic or irritant reaction to substances that come into contact with the eyelids, such as makeup, makeup remover, or certain chemicals.

Thyroid Eye Disease: Although less common, thyroid disorders can cause eyelid retraction, dryness, and discomfort. Missing this diagnosis could lead to significant morbidity if not properly managed.
Sjögren's Syndrome: An autoimmune disorder that can cause dry eyes and dry mouth, among other symptoms. It's crucial to diagnose this condition to manage its systemic implications.
Lymphoma: In rare cases, persistent or severe eyelid symptoms could be a sign of lymphoma. Early detection is critical for effective treatment.

Graft-Versus-Host Disease (GVHD): In individuals who have undergone bone marrow or stem cell transplants, GVHD can cause a variety of symptoms including dry, itchy eyes.
Sarcoidosis: A condition where inflammatory cells form lumps known as granulomas in various parts of the body, including the eyes, leading to dryness and itchiness among other symptoms.
Ocular Cicatricial Pemphigoid: A rare autoimmune disorder that causes blistering and scarring of the conjunctiva and can lead to dry, itchy eyes.