Demodex Blepharitis (Eyelash Mites): Signs, Causes and What Helps

By Nizam Diveli, registered optometrist and founder of BlinkBetter

Demodex blepharitis is eyelid inflammation linked to an overgrowth of tiny mites that live in the eyelash follicles. The tell-tale sign is waxy, sleeve-like debris at the base of the lashes, called collarettes or "cylindrical dandruff". Itchy lid edges, especially in the morning, are typical. Almost everyone carries a few of these mites harmlessly. When numbers build up, a consistent daily lid-cleaning routine is the main way to keep it under control.

Not sure what's causing your symptoms? Try our free eyelid symptom checker. It takes about a minute.

What is Demodex?

Demodex are microscopic mites, far too small to see without a microscope, that live in hair follicles and oil glands on human skin, including the eyelashes. Two types live around the eyes: one in the lash follicles and one in the small oil glands of the lid.

Most adults have some, and they're considered part of the normal ecology of the eyelid. A UK expert panel noted that while Demodex is present in almost everyone, it doesn't necessarily cause disease (Review of Optometry, reporting a UK Delphi study). Problems start when the mites multiply, irritate the lid margin and block the follicles and glands. Numbers tend to rise with age.

Signs and symptoms of Demodex blepharitis

• Collarettes: waxy, clear-to-cream "sleeves" wrapped around the base of the lashes. This is the most characteristic sign; an optometrist will look for it under magnification.
• Itchy eyelid edges, often worst first thing in the morning
• red, irritated lid margins
• a gritty or "something in my eye" feeling
• dry, uncomfortable eyes that don't settle with drops alone
• lashes that are misdirected, thinning or falling out more than usual
• blepharitis that keeps coming back despite cleaning

A UK expert consensus found lid itch, grittiness and a foreign-body sensation were the symptoms most associated with Demodex. Cylindrical dandruff, and blepharitis that wasn't responding to normal treatment, were the most telling signs (Review of Optometry).

How is it different from other blepharitis?

Demodex is one of several causes of blepharitis. It often overlaps with meibomian gland dysfunction (MGD) and dry eye: the mites can block the oil glands and unsettle the tear film. The practical difference is the collarettes, and the fact that ordinary cleaning alone sometimes isn't enough to keep it in check.

	Demodex blepharitis	Other anterior blepharitis
Debris	Waxy collarettes hugging the lash base	Loose flakes and crusts along the lid
Main symptom	Itch along the lid edge	Soreness, stickiness, crusting
Often linked with	Older age, rosacea, MGD	Skin bacteria, seborrhoeic dermatitis

What causes Demodex numbers to build up?

There isn't always a clear reason, but overgrowth is more common:

• with age: numbers rise in older adults
• in people with rosacea
• when lids and lashes aren't cleaned regularly, or eye make-up is left on
• with old or shared eye make-up and brushes

Having Demodex isn't a sign of being unclean. It's extremely common.

How to manage Demodex blepharitis at home

The foundation is the same as any blepharitis: a daily routine to clear debris from the lid margins and lash bases (nidirect, NHS Scotland eyecare guidelines).

1. Clean the lash line daily, morning and night when it's flaring. Focus on the base of the lashes, where collarettes collect. Our step-by-step lid cleaning guide shows the technique.
2. Use a warm compress for 5 to 10 minutes first if your oil glands are also blocked (common alongside Demodex). This softens debris and helps the glands flow.
3. Keep going for at least 6 to 8 weeks. A mite's life cycle runs a few weeks, so short bursts of cleaning tend to let numbers bounce back.
4. Look after your make-up and bedding. Replace old mascara and liners, don't share them, and wash pillowcases and face cloths regularly.

What about tea tree oil?

Tea tree oil, and its main active component terpinen-4-ol, is the most widely used approach for Demodex around the eyes. A UK expert consensus panel considered tea tree products appropriate first-line options (Review of Optometry). That said, a Cochrane review found the evidence is still uncertain, and suggested lower concentrations may be preferable for comfort (Cochrane review).

Strong tea tree oil can sting and irritate. Never put neat tea tree oil near your eyes. Use products made for the eyelids, at the concentration your optometrist recommends.

What helps

• For daily lid cleaning: our BetterScrub eyelid wipes are a UKCA-registered medical device for eyelid hygiene, with tea tree, and a textured side designed for working along the lash base. Use a fresh wipe for each eye.
• If you prefer to cleanse at the sink: our Eyelid Cleansing Foam is designed to gently cleanse the lids and lashes.
• For the warm step: our SelfHeat eye mask is designed to give steady warmth without a microwave.

These are for eyelid hygiene; they aren't a treatment that targets mites directly. You'll find the routine in our Demodex collection.

What an optometrist can do

If daily cleaning hasn't helped after about 6 weeks, see an optometrist. They can spot collarettes under the slit lamp, sometimes check a lash under magnification, and look for MGD or dry eye alongside it. Options they may suggest include:

• stepping up how often you clean
• an in-practice tea tree treatment at a higher strength than you'd use at home, applied professionally
• in-clinic lid debridement, a deep clean of the lid margins
• intense pulsed light (IPL) in some practices, especially if rosacea or MGD is involved
• a short course of anti-inflammatory treatment for very inflamed lids, or tablets in stubborn cases, via your optometrist, GP or eye clinic

(Review of Optometry, College of Optometrists)

Prescription drops for Demodex: in the US, a prescription eye drop that targets the mites directly (lotilaner 0.25%) was approved in 2023, and it has since been approved in China. As of mid-2026, it isn't available in the UK (Ophthalmology Times), so UK care still centres on lid hygiene and the in-clinic options above.

When to see an optometrist or GP

• symptoms haven't improved after 6 weeks of daily cleaning
• you're losing lashes or lashes are growing in the wrong direction
• you keep getting styes or lumps

Get help the same day if you have a painful red eye, sensitivity to light, or a change in vision that doesn't clear when you blink (nidirect).

Frequently asked questions

Is Demodex contagious?

The mites can pass between people through close contact or shared items, but because nearly all adults already carry some, catching them isn't really the issue; overgrowth is. Still, avoid sharing make-up, towels and pillows.

Can you see Demodex mites?

No, not with the naked eye. What you might notice is the collarettes, the waxy debris at the base of the lashes, though they're easiest to see under an optometrist's microscope.

Does Demodex go away on its own?

Mild overgrowth can settle with good lid hygiene, but it tends to come back if you stop. Think of it as ongoing maintenance.

Can I wear eye make-up?

Yes, but remove it fully every night, replace mascara regularly, and avoid sharing products or brushes.

Do I need to treat my pillow and bedding?

Regular washing of pillowcases and face cloths is sensible, but daily lid cleaning is what makes the real difference.

The short version

Demodex are tiny mites most of us carry. When they build up, they cause itchy lids and waxy collarettes at the lash base. Clean the lash line every day for at least 6 to 8 weeks, use warmth if your oil glands are blocked too, and see an optometrist if it isn't improving.

This guide is general information, not a diagnosis. If you're worried about your eyes, see an optometrist.