Ingrown Eyelash (Trichiasis): Why Lashes Grow Toward the Eye and What Eye Doctors Do

It is the end of a long day, and your eye feels as if a grain of sand is stuck under the lid. You check the mirror and see nothing. You rinse, blink, rub, and the feeling stays. Sometimes the cause is surprisingly small: a single eyelash pointing the wrong way.

Doctors call this trichiasis. In plain terms, an ingrown eyelash is a lash that grows back toward the eye instead of outward. Every blink then drags that lash across the clear front surface of the eye, and the irritation can build quickly.

The tricky part is that trichiasis is easy to mistake for dry eye, an allergy, or a reaction to something you put near your lashes. This guide explains what it is, why it happens, how it differs from similar eyelid problems, and what eye-care professionals do about it.

Medical references describe it simply as normal lashes growing inward; one clinical overview of eyelash disorders notes that in trichiasis the follicle itself is normal but the direction of growth is not. That detail matters, because it separates trichiasis from conditions where the eyelid itself turns inward.

Key Takeaways

• Trichiasis means lashes that grow toward the eye and rub the cornea, the conjunctiva, or the inside of the lid.
• Common symptoms include a gritty or foreign-body feeling, redness, watering and light sensitivity, though some people notice nothing at all.
• Causes range from long-term lid inflammation and past injury to scarring conditions; sometimes no cause is found.
• Lashes that keep rubbing the eye can scratch the cornea, so persistent symptoms deserve a proper exam.
• Treatment aims to remove the lash and its follicle or redirect the growth, and it depends on how many lashes are involved.
• This article is general information, not a diagnosis. Please see a licensed eye-care professional for any eye or eyelid concern.

What exactly is an ingrown eyelash?

The American Academy of Ophthalmology describes trichiasis as a common eyelid problem in which lashes grow inward and rub against the cornea, the conjunctiva and the inner surface of the lids. It is more common in adults than in children, and in some people no clear cause is ever identified.

Your upper lid carries roughly 100 to 150 lashes and the lower lid roughly 50 to 75, according to EyeWiki, the Academy’s clinical wiki. Only a few of those lashes need to go astray for symptoms to appear.

Minor versus major trichiasis

Clinicians often sort cases by how many lashes are affected. Fewer than five misdirected lashes is generally called minor trichiasis, while five or more is called major. The count matters because it shapes the treatment options, as covered below.

Which lid is usually affected?

Clinical references report that trichiasis most often affects the lower lid. Exceptions include chemical burns, which can affect both lids, and trachoma, where the upper lid tends to be hit harder.

How can you tell it is not just dry eye?

Symptoms overlap with many everyday eye complaints, which is exactly why trichiasis gets missed. People describe:

• A scratchy, gritty or “something is in my eye” sensation that does not go away
• Redness, especially after blinking a lot or rubbing
• Watering or tearing
• Sensitivity to bright light
• Eye pain or discomfort that seems to come and go
• Blurred vision in more advanced cases

Some people have no symptoms at all, particularly when only a couple of fine lashes are involved. Others feel it intensely, because lashes are coarser than most body hair.

A useful clue is that the discomfort is often worse at certain angles or when you blink, and it can return even after you flush the eye. Dry eye usually feels more diffuse and is often relieved, at least briefly, by lubricating drops. If you are unsure which you are dealing with, an exam answers it quickly. Eye doctors use a slit lamp, a microscope with a bright light, to look at the lid margin and the lash direction, and may use a dye to check the cornea for scratches.

Why do lashes start growing the wrong way?

There is rarely a single answer. The Academy lists several recognized risk factors, and other clinical sources add to the list.

Long-term lid inflammation

Chronic blepharitis, an ongoing inflammation of the lid margins, is one of the better-known contributors. Swelling and scarring at the base of the lashes can nudge follicles off course. If crusty, itchy lids are part of your story, our guide to lid inflammation explains what eye doctors look for and how lid care fits in.

Injury, burns and surgery

Scar tissue after trauma, chemical or thermal burns, or eyelid surgery can change the angle at which lashes emerge. This is one reason a history of eyelid injury is worth mentioning at an appointment, even if it was years ago.

Infections and skin conditions

Herpes zoster affecting the eye, trachoma (a serious infection that is a leading cause of trichiasis in some parts of the world), and scarring conditions of the skin and mucous membranes such as Stevens-Johnson syndrome and ocular cicatricial pemphigoid are all named as possible causes. Clinical references also mention eczema, atopic disease and a past chalazion, where the healed bump can change the lid’s architecture and turn nearby lashes inward.

Developmental and age-related changes

Epiblepharon is a congenital fold of skin that pushes lashes into a vertical position and is mostly seen in children of Asian ancestry. Many children outgrow it as the face develops. In adults, age-related loosening of the lid can contribute through a related problem, covered next.

Could a lash product be involved?

EyeWiki notes that topical prostaglandin use, as well as other chronic lid and lash inflammation, may result in trichiasis. That is a reason to treat persistent irritation seriously rather than to panic: most people who use lash products never develop it. If you have had lash serum irritation that does not settle, stop the product and let an eye professional examine you. Our overview of bimatoprost side effects covers what the US prescribing information lists for that drug.

Is it the same as entropion or double lashes?

Not quite, and the difference changes the treatment.

• Trichiasis: the lid is in the right position, but lashes grow in the wrong direction.
• Entropion: the eyelid margin itself turns inward, so normal lashes end up rubbing the eye. Clinicians sometimes call the result pseudo-trichiasis, and it is usually fixed by correcting the lid position.
• Distichiasis: an extra row of lashes grows from where the oil glands sit and can brush the eye. It is uncommon.

Only an examination can tell these apart, which is another reason not to guess from a mirror.

Can everyday habits make things worse?

Habits do not usually cause trichiasis on their own, but they can irritate a lid that is already sensitive or hide the early signs.

• Curling and pulling. Repeated tugging stresses lashes and follicles; see our notes on eyelash curlers for gentler technique.
• Extensions and adhesives. Heavy or poorly applied sets can inflame the lid and change how new lashes emerge, so read about lash extensions and recovery if you wear them.
• Rough makeup removal. Scrubbing leaves the lid margin red and sore. Learn how to remove eye makeup without dragging at the lashes.
• Rubbing the eye. It feels better for a second and can scratch a cornea that is already being rubbed from the inside.

What can you do while you wait for an appointment?

Home care cannot fix a lash that is growing the wrong way, but it can keep you more comfortable and protect the eye in the meantime.

• Wash your hands before touching the eye area.
• Use preservative-free lubricating drops if your eye feels dry or gritty, following the label.
• Apply a clean, warm (not hot) compress to closed lids for a few minutes if they feel crusty or inflamed.
• Pause eye makeup, extensions and any new lash products until you have been seen.
• If you wear contact lenses, consider switching to glasses until the eye is examined, since a lens can trap a scratch-causing lash against the cornea.

What to avoid

Do not dig at the lid with tweezers or needles. The lash is close to the cornea, the hands shake when you are uncomfortable, and a slip can injure the eye. Do not use leftover antibiotic drops without a diagnosis either. If a lash is plainly visible and a professional says it is fine to remove, they can do so safely in the office.

How do eye doctors treat trichiasis?

The Academy explains that treatment involves removing the lash, the follicle, or both, or redirecting the growth. Which approach makes sense depends on the number of lashes, the cause, and how the eye surface looks.

When only a few lashes are involved

• Epilation: the clinician removes the offending lash with fine forceps. Relief is quick, but the lash tends to grow back, often within weeks, because the follicle is still there.
• Ablation: laser, radiofrequency, electrical current or freezing is used to treat the follicle so the lash does not return. The eye is numbed and it is generally an outpatient procedure.
• Electrolysis or cryotherapy: described by consumer-health sources as ways to destroy the root of individual lashes or larger patches.

When many lashes or the lid itself are involved

Surgery may reposition the lashes or the lid, or remove a segment of follicles. In trachoma-related disease, reviews suggest surgery is often the most effective route. If the underlying cause is entropion, correcting the lid position is the main goal.

Treating the eye surface too

If a lash has already scratched the cornea, a clinician may add lubricating ointment or, where there is infection risk, antibiotic drops. This is why a prompt check matters more than the lash itself.

Will an ingrown eyelash grow back?

That depends on the treatment. A plucked lash usually returns, and because lashes cycle through resting and shedding phases, a new one may even appear in a slightly different direction later. If you want to understand why timing is hard to predict, read our guide to the growth cycle. Ablation and surgery aim for a more lasting result, although recurrence is possible and follow-up visits are normal.

When is it more than a nuisance?

Lashes that keep rubbing the cornea can cause an abrasion or even a corneal ulcer, which can become infected. Get seen promptly if you have:

• Significant eye pain or strong light sensitivity
• Reduced or blurry vision
• Thick or colored discharge
• A very red eye that is getting worse
• Symptoms after an eye injury or chemical exposure

Urgent symptoms like these should not wait for a routine appointment.

Frequently Asked Questions

Is an ingrown eyelash dangerous?

Usually it is more irritating than dangerous, but a lash that rubs the cornea for a long time can cause an abrasion or ulcer. That is why persistent symptoms deserve an exam rather than weeks of waiting.

Can I pull out an ingrown eyelash myself?

It is better not to. You risk scratching the eye or leaving a broken stub that irritates more. An eye-care professional can remove it quickly and check the cornea at the same time.

Do children get ingrown eyelashes?

Yes. Epiblepharon is a common cause in young children, and many outgrow it. A pediatric eye exam can confirm whether it is only a lid fold and whether the eye surface is being scratched.

Is trichiasis contagious?

No, the lash direction problem itself is not contagious. Some infections that can lead to it, such as trachoma, are.

Can lash growth products cause ingrown lashes?

Evidence is limited. EyeWiki mentions prostaglandin eye drops as one possible association, but most users of lash products do not develop trichiasis. If you notice new irritation or a lash pointing toward the eye, stop the product and see an eye professional.

Does a lash lift fix ingrown lashes?

Some beauty sources mention lifts as a cosmetic way to tilt lashes outward, but this is not a medical treatment and carries its own risk of lid irritation. Check with your eye doctor first, especially if you also use a serum; our guide to lash lift timing with serum covers cautions.

A note on professional care

This article is for general education and cannot diagnose or treat any condition. If you have eye pain, redness, discharge, vision changes or a lash that seems to be growing toward your eye, please talk to a licensed clinician such as an ophthalmologist or optometrist. Products, including any lash serum, should never replace an eye exam.

Sources

• American Academy of Ophthalmology, “What Is Trichiasis?” (EyeSmart eye health guide)
• StatPearls (NCBI Bookshelf, National Library of Medicine), “Diseases of the Eyelashes” and “Entropion”
• EyeWiki, American Academy of Ophthalmology, “Trichiasis”
• WebMD, “Trichiasis: When Eyelashes Grow Toward the Eye,” medically reviewed October 2025
• All About Vision, “Trichiasis (ingrown eyelashes): Causes, symptoms and treatment”