A person may experience swelling in one or both eyelids. Swelling may be painless or accompanied by itching or pain. Eyelid swelling is distinct from bulging eyes (see Symptoms of Eye Disorders: Eyes, Bulging), although a few disorders can cause both.
Eyelid swelling has many causes (see Symptoms of Eye Disorders: Some Causes and Features of Eyelid Swelling). It usually results from an eyelid disorder but may result from disorders in and around the eye socket (orbit) or from disorders elsewhere in the body that cause widespread swelling.
The most common causes are allergic, including
Swelling of one place in one eyelid is common and is most often caused by a blocked oil gland (chalazion) or a bacterial infection of a hair follicle (stye or hordeolum—see Eyelid and Tearing Disorders: Chalazion and Stye (Hordeolum)).
Less common causes:
Less common causes include disorders that cause generalized body swelling, particularly a type of kidney disease called nephrotic syndrome, bacterial infection of the skin of the eyelids and around the eyes (periorbital cellulitis), chronic inflammation of the eyelid margins (blepharitis), and underactive thyroid gland (hypothyroidism). An overactive thyroid gland can cause bulging eyeballs but does not cause swollen eyelids.
Rare but dangerous causes are infection within the orbit and around and behind the eye (orbital cellulitis) and blockage of a vein at the base of the brain by an infected blood clot (cavernous sinus thrombosis).
The following information can help people decide whether a doctor's evaluation is needed and help them know what to expect during the evaluation.
In people with eyelid swelling, certain symptoms and characteristics are cause for concern. They include
When to see a doctor:
People with warning signs should see a doctor right away. If pain occurs, people usually want to see a doctor within a day or two so that they can start to feel better.
What the doctor does:
Doctors first ask questions about the person's symptoms and medical history. Doctors then do a physical examination. What they find during the history and physical examination often suggests a cause of the swelling and the tests that may need to be done (see Symptoms of Eye Disorders: Some Causes and Features of Eyelid Swelling).
During the physical examination, doctors look for signs of disorders that may affect other parts of the body, but the focus is primarily on the eyes. They look for runny nose and other signs of allergies, toothache or headache, which may indicate a dental or sinus infection, fever, and changes in skin near the eye.
Any eyelid or eye sore is evaluated by using a slit lamp (an instrument that enables a doctor to examine the eye under high magnification). Doctors check the location and color of the swelling and whether the eyelid is tender or warm, whether vision is affected, whether eye muscles are functioning normally, and whether any discharge is present.
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In most cases, doctors can determine the cause of eyelid swelling based on the symptoms and the findings during the physical examination, and no testing is needed. However, if doctors suspect orbital cellulitis or cavernous sinus thrombosis, they immediately do computed tomography (CT) or magnetic resonance imaging (MRI). If a heart, liver, kidney, or thyroid disorder is suspected, doctors do laboratory tests and sometimes various imaging tests.
The best way to treat eyelid swelling is to treat the disorder that is causing the swelling. There is no specific treatment for the swelling.
Last full review/revision August 2012 by Kathryn Colby, MD, PhD