Nearly  90% of adults host this tiny mite called Demodex. Don’t panic: normally, it lives discreetly in hair follicles and sebaceous glands, particularly around the eyelashes and on the face. It feeds on dead skin cells and sebum… a kind of natural cleaning, in short. 

There are two main types in humans:  Demodex folliculorum , which likes to nest in eyelashes, and  Demodex brevis , which prefers sebaceous glands. As long as their numbers remain low, there’s no problem. But when their population  increases significantly , that’s when things get complicated…

When Demodex becomes an invasive infestation: signs not to ignore

Are you wondering if this tiny parasite could be the cause of your eye problems? Here are the signs that should raise a red flag: 

• Persistent itching around the eyes
• A burning or tingling sensation
• Redness and swollen eyelids
• Small crusts or  flakes  at the base of the eyelashes
• Loss of eyelashes or weakened regrowth

These symptoms can indicate demodectic blepharitis, a chronic inflammation of the eyelids. Sometimes, it can progress to conjunctivitis or a form of ocular rosacea. The problem? It can’t be diagnosed on its own: only a medical examination (often an eyelash sample) will confirm the presence of Demodex mites.

Why do they proliferate in some people?

Several factors can promote their multiplication:

• Oily skin   (dust mites thrive on sebum)
• A hot and humid climate
• Age (they are more common after 40)
• A weakened immune system

In short, anything that unbalances the skin or diminishes its natural ability to defend itself can open the door to them.

How to get rid of Demodex without damaging your skin?

Fortunately, it is quite possible to keep them at bay with simple and gentle gestures:

1. Adopting targeted hygiene

Use eyelid cleansers (often containing  tea tree oil ) morning and night. They help remove debris and cleanse the eyelashes.

2. Stop bad habits

Never sleep with your makeup on, avoid rubbing your eyes and regularly wash your pillowcases, towels and makeup brushes.

3. Follow the prescribed treatment in case of infestation

If necessary, an ophthalmologist can recommend appropriate topical care, or even more targeted treatment depending on the severity.

4. Avoid transmission

Even though these mites are very common, it is best not to share towels or makeup products to limit their spread.

And now? Keep your eyes open… but stay calm!

Demodex mites aren’t a sworn enemy. They’ve always lived inside us, often silently. But if they decide to cause trouble, it’s best to know how to react. So at the first sign of trouble, don’t panic: get equipped, clean, and consult a doctor if necessary.

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