Demodex, Pillows and Partners

Key overview

  • Demodex is near-universal in adults. Almost everyone has some, so acquiring them is not what causes disease — population size is.
  • Because of that, household decontamination is a minor factor compared with sustained lid treatment.
  • Partners do not routinely need treating unless they have symptoms of their own.
  • Washing pillowcases and discarding eye makeup are sensible and cheap. Neither substitutes for the lid routine.

Once someone is told they have eyelid mites, the questions that follow are usually about the house rather than the eyelids. Can I give them to my partner. Do I need to boil the bedding. Should I throw out the pillows. These are reasonable questions and the honest answers are less dramatic than people expect.

Almost everyone already has them

Demodex mites live in human hair follicles, including eyelash follicles, and their prevalence rises steadily with age until it is close to universal in older adults. You did not catch them from anyone in a meaningful sense, and you are unlikely to be the source of anyone else's problem.

What distinguishes people with Demodex blepharitis from the majority who carry mites uneventfully is population density and the inflammatory response to it. That is driven by the local environment of the lid margin — oil composition, skin conditions such as rosacea, immune factors — far more than by exposure.

This matters practically, because it changes where effort is worth spending. Sterilising a bedroom does not address why this particular lid margin supports a larger population than it should.

Bedding, towels and what is worth doing

Reasonable, cheap and worth doing:

  • Wash pillowcases regularly — weekly is fine — in a hot wash. This is ordinary hygiene rather than a treatment.
  • Use your own towel and face cloth, particularly during active treatment.
  • Discard eye makeup that was in use before treatment started, especially anything applied at the lash line. Mascara is the one to be strict about.
  • Do not share eye makeup or applicators, ever, which is good advice independent of mites.

Not worth doing: replacing mattresses, buying specialist sprays for furniture, or treating the house. There is no evidence that environmental reservoirs drive eyelid disease, and money spent there is money not spent on the thing that works.

Partners

Close contact can transfer mites, and couples do sometimes show similar densities. But given that most adults already carry them, transfer between partners is rarely the reason one of them develops symptoms.

The sensible position is that a partner with no symptoms needs no treatment. A partner with itching, crusting or recurrent styes should be assessed on their own account, not as a secondary case. If both of you have symptoms, both of you should be treating — not because of transmission, but because you both have something worth treating.

Pets

The Demodex species that affect dogs and cats are different from the human ones and do not transfer to people in ordinary circumstances. A dog with demodectic mange is a veterinary problem, not an ophthalmic one for you.

Where the effort actually belongs

If you take one thing from this page: household measures are the easy part and the small part. The treatment that changes outcomes is sustained lid margin work over a period long enough to outlast the mite life cycle, which our 12-week treatment plan sets out.

People frequently do the household measures diligently — which are visible, finite and satisfying — while doing the nightly lid routine intermittently. The reverse allocation would serve them better.

Where our products fit

The routine that matters is the nightly one. LidBoost+ is cold-pressed castor oil for the lid margin, applied along the lash line rather than into the eye.

Part of our guide to Demodex & Blepharitis.