Blepharitis makes the eyelid margins look red, swollen, and crusty, often with visible flaking or scaling right where the eyelashes meet the skin. It can affect one or both eyes, and the specific appearance depends on which part of the eyelid is involved. Some forms produce dry, flaky debris while others leave eyelids looking oily and coated. Here’s what to look for.
The Most Common Visual Signs
The first thing most people notice is redness and puffiness along the rim of the eyelid. The lid margin, that thin strip of skin where your lashes grow, becomes visibly inflamed. In many cases, the eyelids also change color, appearing darker or more pink than the surrounding skin.
Beyond redness, blepharitis produces several recognizable signs you can see in a mirror:
- Crusted eyelashes: Flakes or crusty debris cling to the base of your lashes, especially noticeable when you wake up.
- Greasy-looking eyelids: The lid margins may appear shiny or coated, as if smeared with a thin layer of oil.
- Flaking skin around the eyes: Small white or yellowish flakes, similar to dandruff, collect on the lids and occasionally fall onto the cheeks.
- Eyelids stuck together: After sleep, the upper and lower lids may be sealed shut with dried discharge.
- Foamy tears: The tear film can look bubbly or frothy along the lower lid, a sign the oil and water layers of your tears aren’t mixing properly.
- Red, bloodshot eyes: The whites of the eyes often look pink or irritated alongside the lid inflammation.
Anterior Blepharitis: Flakes at the Lash Base
Anterior blepharitis targets the outside front edge of the eyelid, right at the base of the eyelashes and the lash follicles. What it looks like depends on the cause. When bacteria are driving the inflammation, you’ll typically see hard, brittle scales that form little collars (sometimes called collarettes) wrapping around individual lash roots. These look like tiny white or yellowish rings hugging the base of each lash.
When the cause is more related to oily skin (seborrheic blepharitis), the appearance shifts. Instead of hard flakes, you’ll see softer, greasy crusting on the lashes. The scales look oily rather than dry, and the entire lid margin tends to have that characteristic shiny, coated appearance. People with dandruff or seborrheic dermatitis on their scalp often develop this form.
Posterior Blepharitis: Clogged Oil Glands
Posterior blepharitis affects the inner edge of the eyelid, where tiny oil glands called meibomian glands line the lid margin. These glands normally release a thin, clear oil that coats your tears and keeps them from evaporating. When they become blocked, the gland openings may look capped with hardened oil or appear visibly dilated, like small raised dots along the inner lid rim. If you were to gently press on the lid (as an eye doctor might during an exam), the secretions would come out cloudy and thick instead of clear and smooth.
This type of blepharitis is closely tied to dry eye. Because the oil glands aren’t functioning properly, tears evaporate too quickly, leaving the eyes feeling gritty and looking red. The foamy or frothy tear film is especially common with posterior blepharitis.
Cylindrical Dandruff: A Sign of Mites
One specific visual pattern is worth knowing about. Cylindrical dandruff, also called cylindrical casts, looks like clear or waxy tube-shaped cuffs that collar the root of each lash right where it emerges from the skin. Unlike regular flaking, which sits loosely on or near the lashes, cylindrical dandruff is physically connected to and contiguous with the lash root. It wraps around the lash like a sleeve.
This appearance is considered a hallmark of Demodex mite infestation, a common contributor to blepharitis. These microscopic mites live in eyelash follicles and are found in high numbers when cylindrical dandruff is present. The distinction matters because this type of blepharitis may need a different treatment approach than bacterial or seborrheic forms.
How Mild and Severe Cases Differ
Blepharitis exists on a spectrum. Mild cases might show only slight pinkness along the lid margin with a few flakes at the lash base. You might notice your eyelids feel a little sticky in the morning but look relatively normal by midday. Clinicians grade lid margin redness on a 0 to 3 scale, with each step representing a roughly 25% increase in severity.
Moderate cases bring more obvious redness, thicker crusting, and visible swelling of the lid. Chronic or severe blepharitis can cause the lid margins to become noticeably thickened and rounded over time. In long-standing cases, lashes may fall out in patches or grow in irregular directions. The skin along the lid edge can develop a rough, irregular texture from repeated cycles of inflammation.
Bumps That Develop Alongside Blepharitis
Blepharitis frequently leads to secondary bumps on or near the eyelid that are easy to spot. A stye (hordeolum) appears as a red, painful lump at the base of an eyelash, often looking like a small pimple. External styes sit right at the lash line and may develop a visible pus spot at the center. They can make the entire eyelid swell and are typically quite tender.
A chalazion is a firmer, less painful bump that develops farther back on the eyelid, away from the lash line. It forms when one of the blocked oil glands becomes chronically inflamed rather than infected. Chalazia can grow to the size of a pea and sometimes make the whole lid look puffy. They’re usually not as red or sore as styes, though they can become inflamed and redden over time. Both styes and chalazia are common in people with ongoing blepharitis because the underlying lid inflammation creates the conditions for these bumps to form.
When Facial Redness Accompanies Eye Symptoms
If blepharitis appears alongside persistent redness, visible blood vessels, or small bumps on the cheeks, nose, or forehead, ocular rosacea may be involved. In rosacea-related blepharitis, the lid margins often look thickened and notched, with tiny dilated blood vessels (telangiectasia) running along the lid edge. This goes beyond the typical flaking and redness of standard blepharitis.
Ocular rosacea can also affect the surface of the eye itself. Between 25% and 50% of people with ocular rosacea develop some degree of corneal involvement, ranging from mild surface irritation to more significant changes. The combination of facial flushing, visible facial blood vessels, and chronic eyelid inflammation is the key visual pattern that separates rosacea-driven blepharitis from other forms.