Swelling along the bottom of your eye is almost always caused by fluid buildup in the thin, loose skin of the lower eyelid. This tissue is some of the thinnest on your body, which makes it quick to puff up from allergies, poor sleep, a blocked gland, or an infection. Most causes are harmless and resolve on their own, but a few need prompt attention.
Allergies and Sinus Congestion
Allergic reactions are one of the most common reasons for lower eyelid swelling. When your immune system reacts to pollen, dust mites, pet dander, or other airborne allergens, it triggers swelling in the lining of your nasal passages. That swelling slows blood flow in the small veins that sit just beneath the skin under your eyes. The result is puffiness and dark discoloration, sometimes called “allergic shiners.”
If allergies are the cause, you’ll typically notice itching, watery eyes, and sneezing alongside the swelling. The puffiness often affects both eyes and may come and go with the seasons or after exposure to a specific trigger. Over-the-counter antihistamines and avoiding the allergen usually bring it down within hours.
Fluid Retention From Sleep, Salt, or Alcohol
Waking up with puffy lower lids is extremely common and often has nothing to do with disease. During sleep, fluid redistributes across your face because you’re lying flat for hours. A high-salt meal the night before increases the amount of fluid your body retains, and alcohol makes it worse by causing dehydration, which paradoxically triggers your body to hold onto more water.
This type of swelling is usually worst in the morning and fades within an hour or two of being upright. It tends to look smooth and rounded, sitting right over the cheekbone below the lower lid. Cutting back on salt, staying hydrated, and getting consistent sleep are the most effective long-term fixes. A cold compress held gently over the area for 15 minutes can speed things along in the short term. You can repeat that every couple of hours, but never place ice directly on the skin.
Styes and Chalazia
A stye is a small, red, painful bump that forms when bacteria infect an oil gland in the eyelid. It typically appears right at the lid margin, where your lashes grow, and it hurts. The surrounding skin swells, and you may feel like something is in your eye. Styes are caused by common staph bacteria and tend to come to a head and drain on their own within a week.
A chalazion starts similarly but takes a different path. Instead of an active infection, a blocked oil gland leaks fatty material into the surrounding tissue, triggering inflammation. After a day or two, the swelling localizes into a firm, usually painless nodule in the body of the eyelid, farther from the lash line than a stye. Chalazia can linger for weeks or even months. Warm compresses applied for 10 to 15 minutes several times a day help soften the blockage and encourage drainage. If one doesn’t resolve after a month, a doctor can drain it with a simple in-office procedure.
Blepharitis
Blepharitis is chronic inflammation of the eyelid margins that causes redness, itching, burning, and crusty buildup along the lashes. It’s often linked to bacteria that live on the skin or to underlying conditions like rosacea. Because it irritates the lid tissue directly, the lower eyelid can look swollen, red, and flaky for weeks at a time.
The hallmark sign is waking up with lashes that feel sticky or matted together. You might also notice a gritty sensation or eyes that tear more than usual. Blepharitis tends to be a recurring condition rather than something that fully goes away, but daily lid hygiene (gently cleaning the lash line with a warm, damp cloth) keeps flare-ups manageable.
Contact Dermatitis Around the Eye
The skin around your eyes can react to products you wouldn’t expect. Cosmetics, skincare ingredients, fragrances, preservatives in eye drops, shampoo, conditioner, and even laundry detergent can all trigger periorbital dermatitis. There are two forms: allergic, where your immune system reacts to a specific ingredient, and irritant, where a harsh chemical directly damages the skin.
Allergic reactions tend to itch. Irritant reactions tend to burn. Both cause redness, scaling, and swelling of the lower lid. If the exposure continues over time, the skin can thicken and develop a rough, creased texture. The fix is identifying and eliminating the offending product. If you recently switched a cosmetic, cleanser, or detergent and your lower lid started swelling shortly after, that’s a strong clue.
Malar Bags vs. Festoons
If your lower eyelid swelling has been around for a while and doesn’t seem tied to allergies, sleep, or infection, you may be looking at a structural issue. Malar bags are soft, smooth swellings that sit over the cheekbone just below the lower lid. They’re caused by fluid retention in the fat pad of the midface and tend to fluctuate throughout the day, looking worse in the morning and improving as gravity pulls fluid downward.
Festoons are a more advanced version. These are actual folds of loose skin and weakened muscle that drape between the lower lid and the upper cheek. Unlike malar bags, festoons don’t improve with time of day because the underlying problem is structural, not fluid-based. The skin may look thicker, irregular, or visibly creased. Festoons sit lower on the cheek than malar bags and persist regardless of how much sleep you get or how little salt you eat. Both conditions become more common with age, sun exposure, and smoking.
Infections That Need Attention
Most lower lid swelling is benign, but two infections are worth knowing about. Preseptal cellulitis is a bacterial infection of the eyelid and surrounding skin. It causes significant swelling, redness, and tenderness, but the eye itself works normally. Your vision stays clear, you can move the eye in all directions without pain, and the white of the eye looks normal once you pry the swollen lid open.
Orbital cellulitis is the more dangerous version. The infection has moved behind the eye into the deeper tissues. This causes pain when you move the eye, decreased vision, the eye may appear to bulge forward, and the white of the eye often turns red. If you have lower lid swelling combined with any of these signs, particularly painful eye movement, vision changes, or a bulging eye, that warrants emergency care. Orbital cellulitis can lead to vision loss or spread to the brain if untreated.
How Doctors Evaluate It
For most cases of lower eyelid swelling, a doctor can figure out the cause just by looking at you and asking a few questions. No blood tests or imaging are typically needed. They may use a magnifying slit lamp to examine the lid margin up close, checking for blocked glands, crusty lashes, or small bumps you can’t see in the mirror.
Testing becomes necessary only when something more serious is suspected. If orbital cellulitis or a blood clot in the veins behind the eye is a concern, a CT or MRI scan is done urgently. If the swelling is persistent and accompanied by other symptoms like weight changes, fatigue, or generalized puffiness, thyroid function tests or other organ-specific labs may be ordered to check for systemic conditions like hypothyroidism or kidney dysfunction.
Reducing Swelling at Home
For everyday puffiness, a cold compress is the simplest and most effective tool. Wrap a clean cloth around ice or use a chilled gel pack and hold it over the swollen area for 15 minutes. The National Eye Institute recommends this duration, and you can repeat it every couple of hours. Keep it under 20 minutes per session to avoid skin damage.
Beyond cold compresses, reducing your salt intake makes a noticeable difference if fluid retention is a recurring issue. Sleeping with your head slightly elevated can prevent fluid from pooling around your eyes overnight. For styes and blepharitis, warm compresses work better than cold, since the goal is to loosen blocked oil and reduce bacterial buildup rather than constrict blood flow. If a product is irritating the skin around your eyes, switching to fragrance-free, preservative-free alternatives often resolves the swelling within a few days.