Guide · Demodex face mites
Demodex face mites when they matter, and what actually helps
Almost every adult carries Demodex mites, and most never notice. Here is when face mites become a skin problem, how they link to rosacea, how a doctor treats them, and which hygiene advice is myth.
Quick answer
- Demodex are microscopic mites that live in the hair follicles and oil glands of the face, and a DNA study found them on every adult it sampled. In small numbers they are harmless; problems start when their numbers build up, a condition called demodicosis.
- Demodicosis can look like rosacea or acne: rough, sandpaper-like skin, fine scale around the follicles, itchy or burning cheeks and small bumps or pustules. Higher mite densities are found in people with rosacea, especially the bumpy (papulopustular) type, and itchy, crusted eyelashes can be Demodex blepharitis.
- A doctor confirms it by examining the skin, often with a dermatoscope or a skin surface sample under the microscope, and treats it with prescription medicines such as topical ivermectin or metronidazole, and sometimes oral treatment. Over-the-counter scrubs and stronger cleansing do not reach mites inside the follicles.
- Changing pillowcases daily will not cure demodicosis, and having mites does not mean poor hygiene. At SkinRev Lab, SKINLDM can calm reactive skin alongside medical treatment; diagnosis and prescriptions are by Dr Sin Yong at IN Eternity Clinic, priced at consultation.
The basics
What Demodex face mites are
Demodex are tiny eight-legged mites, about a third of a millimetre long, too small to see without a microscope. Two species live on people. Demodex folliculorum lives in hair follicles, often several together, and Demodex brevis lives singly deeper in the oil (sebaceous) glands. They feed on oil and skin cells and are most numerous where oil glands are dense: the cheeks, nose, forehead, chin and eyelashes.
They are almost universal. A study using a DNA-based method found Demodex on 100% of the adults over 18 that it sampled, which suggests they are normal residents of adult skin. Numbers tend to be low in children and rise after puberty, when oil production increases.
Having face mites is therefore not a sign of being dirty, and it is not something to eradicate. The question a doctor asks is not whether you have Demodex, but whether there are so many that they are inflaming the skin.
When it matters
When face mites become a problem: demodicosis
Demodex usually causes no symptoms. Skin problems tend to appear when mite numbers rise well above normal, or when the skin's immune response to them changes. Doctors call this demodicosis. A commonly used threshold is more than five mites per square centimetre on a standardised skin surface sample, although numbers alone do not make the diagnosis.
Mite numbers can climb with long-term use of steroid creams on the face, with a weakened immune system, and possibly with heavy, occlusive products on oily skin. Demodicosis is often missed because it looks like other common conditions, so it is worth considering when 'acne' or 'sensitive skin' does not behave as expected.
- Pityriasis folliculorum: dry, rough, sandpaper-like skin with fine scale at the follicle openings, often with itch or burning.
- Rosacea-like demodicosis: redness with small bumps and pustules on the cheeks, nose and chin.
- Perioral or periocular demodicosis: small bumps clustered around the mouth or eyes.
- Demodex blepharitis: itchy, red eyelid margins with waxy collars or 'cylindrical dandruff' at the base of the lashes.
- Secondary demodicosis: flares in people using facial steroid creams or with reduced immunity.
Rosacea
Demodex and papulopustular rosacea: what the link is
A systematic review and meta-analysis of 23 case-control studies, including 1,513 people with rosacea, found that people with rosacea were about nine times more likely to have Demodex infestation than people without it, and had significantly higher mite densities. This was true for both the redness-and-flushing type and the papulopustular (bumpy) type. Because the studies were case-control, they could not prove that mites cause rosacea.
Some researchers go further. In a study of 242 patients with central facial bumps, most had features traditionally used to tell papulopustular rosacea and rosacea-like demodicosis apart, at the same time, and the authors suggested the two may be phenotypes of the same disease. Other experts see Demodex as one trigger among several, alongside blood vessels that dilate easily, an over-reactive immune response and nerve sensitivity.
In practice, this is why some rosacea treatments that reduce mites also calm the bumps, and why a doctor may look for Demodex when rosacea does not respond as expected.
Symptoms
Symptoms that point to Demodex, and look-alikes
These are patterns, not a diagnosis. Demodicosis, rosacea, acne, perioral dermatitis and seborrhoeic dermatitis overlap, and more than one can be present. If you have persistent redness, bumps that do not respond to acne care, or eyelid symptoms, see a doctor rather than self-treating.
| Demodicosis | Acne | Sensitised skin | |
|---|---|---|---|
| Typical age | Adults, often over 30 | Teens and young adults, also adults | Any age, often after strong products |
| Surface | Rough, fine follicular scale, sandpaper feel | Oily, with blackheads and whiteheads | Tight, dry or normal-looking |
| Bumps | Small, uniform bumps and pustules, no blackheads | Mixed: blackheads, papules, pustules, cysts | Usually none |
| Sensation | Itch, burning, crawling or prickling | Tender spots | Stinging and burning with products |
| Eyes | Itchy lid margins, crusts at lash bases | Not involved | Sometimes eyelid irritation |
| Clue | Worse after facial steroid creams; poor response to acne care | Responds to standard acne treatment | Settles when products are stripped back |
Diagnosis
How a doctor diagnoses Demodex on the face
Diagnosis starts with a history and examination: where the redness and bumps sit, whether there is scale at the follicles, what you have been applying, and whether steroid creams were used. Under a dermatoscope, a doctor may see small whitish 'tails' protruding from follicle openings and dilated openings with plugs.
To count mites, a standardised skin surface biopsy is often used: a drop of skin-safe glue on a glass slide is pressed onto the skin for about a minute and lifted off, taking the top of the follicles with it, and the mites are counted under a microscope. It is quick and does not cut the skin. For eyelids, a few lashes may be removed and examined.
Getting this right matters because the treatments differ. Acne creams and strong exfoliants can irritate demodicosis, and steroid creams can make it worse.
Treatment
Demodex mites treatment: what doctors use
In a randomised trial of 962 people with moderate to severe papulopustular rosacea, once-daily ivermectin 1% cream reduced inflammatory bumps by 83.0% at 16 weeks, compared with 73.7% for twice-daily metronidazole 0.75% cream, and was better tolerated. In a smaller study of 20 patients with high mite counts, ivermectin cream significantly reduced mite density by weeks 6 and 12 and lowered inflammatory markers in the skin.
Treatment takes weeks, and relapse is common because mites recolonise follicles, so a doctor often plans maintenance. All of these are prescription medicines in Singapore. Do not use animal or veterinary products, or borrow someone else's prescription.
| Treatment | How it is used | Notes |
|---|---|---|
| Topical ivermectin 1% | Prescription cream, usually once daily for weeks to months | Anti-parasitic and anti-inflammatory; reduced mite density in a 12-week study |
| Topical metronidazole | Prescription cream or gel, once or twice daily | Long-standing rosacea treatment; less effective than ivermectin in a head-to-head trial |
| Topical permethrin | Prescription cream, as directed | Used by some doctors for demodicosis; can irritate |
| Oral treatment | Short courses of oral anti-parasitic or anti-inflammatory medicine | For extensive, severe or stubborn cases, decided by a doctor |
| Eyelid care | Lid hygiene and eyelid products for Demodex blepharitis | Eye symptoms should be assessed by a doctor or eye specialist |
| Stopping facial steroids | Tapered under medical advice | Steroid creams can drive mite overgrowth; stopping suddenly can cause a flare |
Myths vs facts
Face mite myths vs facts: skincare, pillowcases and make-up
| Myth | What the evidence says |
|---|---|
| Face mites mean poor hygiene | Nearly all adults carry them. Problems relate to numbers and the skin's response, not cleanliness. |
| Washing more often or scrubbing harder gets rid of them | Mites live inside follicles, out of reach of cleansers. Over-cleansing and scrubs damage the barrier and can worsen redness. |
| Changing pillowcases daily cures demodicosis | There is no good evidence for this. Mites live on the skin, not in bedding. Washing pillowcases regularly is sensible hygiene, not a treatment. |
| Neat tea tree oil is a safe home cure | Undiluted tea tree oil can irritate and cause allergic reactions. Formulated eyelid products are used for blepharitis, but studies are mostly small. |
| Mites cause ordinary acne | Usual acne is driven by oil, blocked pores and bacteria. Demodicosis can mimic acne but is a different condition. |
| Sharing make-up does not matter | Mites spread by close contact. Not sharing eye make-up, brushes and towels is a reasonable precaution, especially with eyelid symptoms. |
Every day
Skincare habits that help in Singapore's heat
- Wash twice a day with a gentle, non-soap cleanser and lukewarm water; more washing is not better.
- Use a light, non-greasy moisturiser; many doctors suggest avoiding heavy oils and occlusive balms on affected areas.
- Wear a gentle broad-spectrum sunscreen daily; UV and heat are common rosacea triggers.
- Pause scrubs, peel pads and strong exfoliating acids while the skin is red or bumpy.
- Do not apply steroid creams to the face unless a doctor has prescribed them for a set period.
- Remove eye make-up gently every night, and replace old mascara and eye pencils.
- Cool down gradually after being outdoors; moving between hot streets and cold air-conditioning sets off flushing in many people.
Where to go
Calming care and medical treatment in our network
Diagnosis and prescription treatment for demodicosis and rosacea are by Dr Sin Yong at IN Eternity Clinic, 9 Scotts Road, #12-01 Pacific Plaza, beside Orchard MRT. He examines the skin, checks what you have been applying, and prescribes where needed; for persistent redness and visible vessels he may also discuss Laser Toning or the 少女光 Laser. Treatment is priced at consultation by the clinic; WhatsApp +65 8815 3008.
SkinRev Lab, at CityLink Mall #B1-28 by City Hall MRT, does not diagnose or treat mites. SKINLDM is a calming facial using non-thermal LDM ultrasound micro-massage with a basic facial, about 30 minutes, S$288 per session before GST, with a first session at S$68. It can be done while skin is red and reactive and sits alongside, not in place of, a doctor's treatment. During an active flare, extraction facials and HydraFacial are better postponed.
Sources
References & sources
- Thoemmes MS, Fergus DJ, Urban J, Trautwein M, Dunn RR. Ubiquity and diversity of human-associated Demodex mites. PLoS One. 2014;9(8):e106265.
- Rather PA, Hassan I. Human demodex mite: the versatile mite of dermatological importance. Indian J Dermatol. 2014;59(1):60-66.
- Chang YS, Huang YC. Role of Demodex mite infestation in rosacea: a systematic review and meta-analysis. J Am Acad Dermatol. 2017;77(3):441-447.e6.
- Forton FMN, De Maertelaer V. Papulopustular rosacea and rosacea-like demodicosis: two phenotypes of the same disease? J Eur Acad Dermatol Venereol. 2018;32(6):1011-1016.
- Taieb A, Ortonne JP, Ruzicka T, et al. Superiority of ivermectin 1% cream over metronidazole 0.75% cream in treating inflammatory lesions of rosacea: a randomized, investigator-blinded trial. Br J Dermatol. 2015;172(4):1103-1110.
- Schaller M, Gonser L, Belge K, et al. Dual anti-inflammatory and anti-parasitic action of topical ivermectin 1% in papulopustular rosacea. J Eur Acad Dermatol Venereol. 2017;31(11):1907-1911.
Common questions
Your questions,
answered
What are Demodex face mites?
They are microscopic mites that live in the hair follicles and oil glands of the face, mainly on the cheeks, nose, forehead, chin and eyelashes. Two species live on people, Demodex folliculorum and Demodex brevis. In normal numbers they cause no symptoms.
Does everyone have mites on their face?
Almost every adult does. A DNA-based study found Demodex on all of the adults over 18 it sampled. Numbers are usually low in children and rise after puberty, when the skin makes more oil.
What are the symptoms of Demodex on the face?
When mite numbers build up, people may notice rough, sandpaper-like skin with fine scale, itching, burning or a crawling feeling, redness, and small uniform bumps or pustules without blackheads. Itchy eyelids with crusts at the lash base can be Demodex blepharitis.
How do you get rid of Demodex mites on the face?
You cannot and need not remove them completely. When they cause demodicosis, a doctor usually prescribes a topical treatment such as ivermectin or metronidazole, sometimes with oral treatment for severe cases, plus gentle skincare. Treatment takes weeks and maintenance is often needed.
Can Demodex cause rosacea?
People with rosacea have much higher mite densities on average, and some experts think rosacea-like demodicosis and papulopustular rosacea are the same disease. The studies show a strong link but cannot prove cause, and rosacea also involves blood vessels, immunity and nerves.
Should I change my pillowcase every day for face mites?
It will not cure demodicosis, because mites live inside your follicles rather than in bedding. Washing pillowcases and towels regularly is reasonable hygiene, but the treatment that works is the one a doctor prescribes for your skin.
Does tea tree oil kill Demodex?
Tea tree oil and its component terpinen-4-ol are used in eyelid products for Demodex blepharitis, but the studies are mostly small. Undiluted tea tree oil can irritate the skin and cause allergic reactions, so do not apply it neat to your face.
Can a facial treat Demodex mites?
No facial treats demodicosis. Calming facials such as SKINLDM at SkinRev Lab can make reactive skin more comfortable alongside medical treatment, but they do not kill mites. Extraction facials and scrubs can irritate inflamed skin and are better postponed.