The Short Answer
A lost eyelash usually grows back to full length in about 6 to 10 weeks, as long as the follicle underneath is healthy. Regrowing a whole set after heavy loss can take up to about 16 weeks. Pulled, cut and trimmed lashes normally regrow, but repeated damage to the follicle can slow or stop regrowth.
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Written by HairGrowthReviews Editorial Team
Reviewed by Ernesta Malinauskytė, PhD, Director of Hair Research, TRI Princeton
Updated 2026-11-11 · Independently researched · How we review
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The Short Version
- A single lost lash usually regrows to full length in about 6 to 10 weeks if the follicle is undamaged. A full set can take up to about 16 weeks.
- Each lash follows a growth cycle: a short growing phase of about 4 to 6 weeks, a 2 to 3 week transition, and a long resting phase of several months.
- Losing 1 to 5 lashes a day is normal. Sudden loss, gaps, or loss together with eyebrow or scalp patches is worth a doctor's visit.
- Cut or trimmed lashes regrow normally from the follicle. Trimming does not make them thicker, longer or faster-growing.
- Bimatoprost 0.03% (Latisse) is the only FDA-approved eyelash growth drug. Results build over about 8 to 16 weeks and fade after stopping.
On This Page · 13 sections
How long does it take for eyelashes to grow back? For most people, a lost lash is back to full length in about 6 to 10 weeks. If you have lost a lot of lashes at once, for example after removing extensions or a bout of eyelid inflammation, it can take up to about 16 weeks for the whole line to look full again. Those timelines assume the follicle, the small structure in the eyelid that makes each lash, is still healthy.
Eyelashes are hair, and they follow the same basic growth cycle as the hair on your scalp. The difference is that the cycle is much shorter. Scalp hair can grow for years before it rests, which is why it gets long. An eyelash grows for only a few weeks before it stops, which is why lashes stay short and why they come back on a fairly predictable schedule.
This page explains the eyelash growth cycle, how long regrowth takes in different situations, what happens if lashes are pulled out, cut or trimmed, and the common reasons lashes fall out, thin or get shorter. It also covers what genuinely helps regrowth, including the one approved prescription treatment, and when lash loss is a reason to see a doctor. It is general information, not medical advice.
How Long Does It Take for Eyelashes to Grow Back?
Once a new lash starts growing, it typically reaches full length in about 6 to 10 weeks. That is the timeline most people care about: you notice a gap, and within two to three months it has filled in. The new lash grows during the active phase of the cycle, then stops at its natural length and sits in place until it eventually sheds.
The full answer depends on what caused the loss. When a lash falls out on its own at the end of its life, a replacement is often already on its way, so you rarely notice a gap. When many lashes are lost at once, the follicles do not all restart at the same moment. Some begin growing almost straight away and others take longer to re-enter the growth phase, which is why regrowing a full lash line after heavy loss can take up to about 16 weeks.
Removing the trigger is what allows the normal 6 to 10 week regrowth to happen.
Regrowth also assumes the cause has stopped. If lashes are still being rubbed off, pulled by extension glue or lost to untreated eyelid inflammation, they will keep falling out faster than they come back. In that situation, waiting longer will not help on its own. Removing the trigger is what allows the normal 6 to 10 week regrowth to happen.
There are a few situations where lashes take longer or may not come back fully. Long-term pulling, scarring of the eyelid margin, and some medical conditions can damage the follicles. In those cases regrowth can be slow, patchy or permanent loss can occur. These are the exceptions, though. For the everyday causes of a missing lash, patience is usually all that is needed.
What Is the Eyelash Growth Cycle?
Every eyelash goes through three phases. The first is anagen, the active growth phase, which for eyelashes lasts roughly 4 to 6 weeks, often given as 30 to 45 days. During this time the follicle is producing the lash, and the lash lengthens day by day. Because this phase is so short, lashes can only reach a limited length before growth stops.
The second phase is catagen, a short transition that lasts about 2 to 3 weeks. Growth stops and the follicle shrinks slightly. If a lash is pulled out during anagen or catagen, the follicle generally needs to finish this part of the cycle before it can make a new lash, which is one reason regrowth is not instant.
The third phase is telogen, the resting phase, and it is by far the longest. For eyelashes it lasts roughly 4 to 9 months, often quoted as 100 days or more. The fully grown lash simply sits in the follicle while a new lash may begin forming underneath. At the end of telogen the old lash sheds, usually without you noticing, and the cycle starts again.
Add those phases together and a full lash cycle runs roughly 4 to 11 months. The lashes on each eyelid are all at different points in this cycle at any moment, which is why you lose a few at a time rather than all at once. It is also why a lash line can look full even though individual lashes are constantly being replaced.
| Typical Length | What Happens | |
|---|---|---|
| Anagen (growth) | About 4–6 weeks (30–45 days) | The follicle actively produces the lash, which lengthens until it reaches its natural size |
| Catagen (transition) | About 2–3 weeks | Growth stops and the follicle shrinks; a lash lost now is not replaced straight away |
| Telogen (rest) | About 4–9 months (often 100+ days) | The full-length lash rests in place, then sheds as a new lash begins to grow |
| Full cycle | Roughly 4–11 months | Each lash runs on its own schedule, so only a few shed on any given day |
Do Eyelashes Grow Back, and Do They Keep Growing?
Yes, eyelashes grow, and in most cases they grow back after they fall out. Each lash comes from its own follicle, and as long as that follicle is healthy it will keep producing new lashes for life. What lashes do not do is keep getting longer. Each lash grows to a set length, determined largely by genetics and the length of the growth phase, and then stops.
Each upper eyelid typically has around 90 to 160 lashes, and each lower eyelid around 75 to 80. Because the lashes are at different stages of the cycle, losing 1 to 5 lashes a day is normal. You might notice one on your cheek, on a pillow or on a makeup remover pad. That is routine replacement, not a sign that something is wrong.
What lashes do not do is keep getting longer.
This constant turnover is easy to misread. People who start paying close attention to their lashes, perhaps after a scare or when trying a new product, often notice shed lashes they would previously have missed. A few lashes a day, with no visible gaps and no other symptoms, fits within the normal cycle.
What matters more than single lashes is the overall pattern. A lash line that keeps its usual fullness is doing what it should. Gaps that appear and do not fill in after a few months, lashes that come out in clumps, or loss that comes with other symptoms are different, and the sections below cover what can cause them.
Will Eyelashes Grow Back If Pulled Out From the Root?
In most cases, yes. When a lash is pulled out, the visible strand comes away, but the follicle that produces it usually stays in the eyelid. Provided the follicle is not damaged, it will go on to grow a new lash on the normal timeline, typically reaching full length within about 6 to 10 weeks once growth restarts.
One-off pulls are common. Lashes can come out with a lash curler, when removing strip lashes or extensions, when rubbing your eyes, or when taking off waterproof mascara. These are annoying but rarely cause lasting harm. The follicle recovers and the gap fills in.
Provided the follicle is not damaged, it will go on to grow a new lash on the normal timeline
Repeated pulling is a different matter. Trichotillomania, a condition in which people feel a strong urge to pull out their own hair, often affects the eyelashes and eyebrows. Over time, repeated trauma to the same follicles can damage them, and long-term pulling can cause permanent lash loss in some areas. The earlier the pulling is addressed, the better the chance of full regrowth.
If you find it hard to stop pulling your lashes, that is worth raising with a doctor or a mental health professional. Trichotillomania is a recognised condition, it is more common than many people realise, and behavioural therapies can help. It is not a matter of willpower, and it is not something to be embarrassed about.
If You Cut or Trim Your Eyelashes, Will They Grow Back?
Yes. Cutting or trimming a lash only removes the part above the skin. The follicle is untouched, so the lash carries on with its cycle. If it is still in the growth phase it will keep lengthening, and if it is in the resting phase it will eventually shed and be replaced by a new, full-length lash.
That replacement can take a while. A trimmed lash in its resting phase does not grow any longer, so it may stay short for weeks or months until it sheds. Across the whole lash line, expect trimmed lashes to look normal again over the course of a few months as each one cycles through.
Cutting a hair does not change the follicle, and the follicle is what controls thickness, length and growth rate.
A common belief is that trimming lashes, like trimming scalp hair, makes them grow back thicker or faster. There is no evidence for this. Cutting a hair does not change the follicle, and the follicle is what controls thickness, length and growth rate. A freshly cut lash can feel blunter because the natural taper at the tip is gone, which may explain the myth.
Trimming lashes near the eye also carries a real risk of injury, and loose cut lash fragments can irritate the eye. If lashes are being trimmed for a medical reason, such as lashes that grow inward toward the eye, that is best left to an eye doctor.
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Why Are My Eyelashes Falling Out?
The most common reason is normal shedding. Losing a few lashes a day is part of the growth cycle and needs no treatment. When loss is heavier than that, the cause is usually mechanical: rubbing your eyes, scrubbing off eye makeup, or using a lash curler can pull out lashes that would otherwise have stayed in place for weeks.
Lash extensions and false lashes are a frequent culprit. The weight of extensions and the glue that holds them can put steady pulling stress on natural lashes, a type of loss called traction. Lashes can also come out with the extensions when they are removed. Taking breaks and having extensions removed professionally reduces the strain.
Eyelid inflammation is another common cause. Blepharitis, an inflammation of the eyelid margins, can cause red, itchy, crusty lids and lash loss. Treating the inflammation, usually with regular lid hygiene and sometimes medication from a doctor, allows lashes to regrow. Allergic reactions to eye makeup or skincare can cause similar irritation.
Some medical conditions affect lashes too. Thyroid disease, both overactive and underactive, can cause lash and eyebrow thinning. Alopecia areata, an autoimmune condition, can cause patchy loss of lashes, brows and scalp hair. Chemotherapy commonly causes lashes to fall out, although they usually grow back after treatment ends. Trichotillomania, covered above, is another important cause.
| Signs | What Helps | |
|---|---|---|
| Normal shedding | 1–5 lashes a day, no gaps | Nothing needed |
| Rubbing or makeup removal | More lashes on remover pads, no lid symptoms | Gentle removal, less rubbing |
| Extensions, false lashes, glue | Loss or gaps after wearing or removing them | Breaks between sets, professional removal |
| Lash curler | Lashes caught or snapped when curling | Gentle use or stopping |
| Blepharitis | Red, itchy or crusty lid edges | Lid hygiene, see a doctor |
| Thyroid disease | Lash and outer-brow thinning, tiredness, weight change | Doctor's assessment and treatment |
| Alopecia areata | Sudden patchy loss, sometimes brows or scalp too | See a doctor or dermatologist |
| Trichotillomania | Urge to pull, uneven gaps | Doctor or therapist support |
| Chemotherapy | Loss during cancer treatment | Usually regrows after treatment ends |
Why Are My Eyelashes Getting Shorter or Thinning?
If your eyelashes are getting shorter or thinning rather than falling out in noticeable numbers, age is a common reason. Like scalp hair, lashes tend to become finer, shorter and sparser over the years. The growth phase can shorten and some follicles produce thinner lashes, so the lash line gradually looks less full. This change is slow and usually affects both eyes evenly.
Repeated low-level damage can also shorten lashes. Heavy mascara, rough removal, lash curlers and extensions can break lashes partway along their length, leaving them shorter without falling out entirely. Because lashes only grow for a few weeks, a broken lash may stay short until it sheds and is replaced.
Like scalp hair, lashes tend to become finer, shorter and sparser over the years.
Thinning can also be an early sign of the same causes that make lashes fall out, including blepharitis, thyroid problems and alopecia areata. Thinning that is uneven, comes on quickly, or happens alongside eyebrow thinning, scalp patches or eyelid symptoms is worth getting checked rather than putting down to age.
For gradual, age-related thinning, the realistic options are to treat lashes gently and, if you want a visible change, to talk to a doctor about the prescription treatment covered below. Over-the-counter conditioners can make lashes look glossier but do not change how the follicle grows.
How Can You Get Eyelashes to Grow Back Faster?
The most effective first step is to stop whatever is causing the loss. Take a break from extensions and strip lashes, remove eye makeup gently, avoid rubbing your eyes, and ease off the lash curler. If your lids are red, itchy or crusty, see a doctor about blepharitis or an allergy. Removing the trigger lets lashes regrow on their normal 6 to 10 week timeline.
The only treatment approved by the FDA to grow eyelashes is bimatoprost 0.03%, sold as Latisse. It was approved in 2008 for people with inadequate or not enough lashes and is available by prescription. It is applied to the base of the upper lashes once a day. Results build gradually, with noticeable changes over about 8 to 16 weeks, and lashes can become longer, thicker and darker.
The only treatment approved by the FDA to grow eyelashes is bimatoprost 0.03%, sold as Latisse.
Bimatoprost has known side effects. These include eye redness and itching, darkening of the eyelid skin, and, in people with light-coloured eyes, a possible permanent darkening of the iris. The effect is not permanent either. Once you stop, lashes gradually return to how they were before. It is a prescription medicine, so a doctor should check that it is suitable for you.
Over-the-counter lash serums are sold as cosmetics, not drugs, so they do not go through the same approval process. Some contain prostaglandin analogues such as isopropyl cloprostenate, which are chemically related to bimatoprost and can carry similar side-effect risks, including lid darkening and irritation. Others rely on peptides and conditioners, which may improve how lashes look but have far less evidence behind them. Our guide to whether eyelash growth serums work covers the options in more detail.
Do Supplements Help Eyelash Growth?
Supplements for eyelash growth, such as biotin and hair, skin and nail blends, are widely marketed, but the evidence is thin. Nutrients like biotin, iron and protein are needed for normal hair growth, and a genuine deficiency can cause thinning hair, including lashes. Correcting a deficiency can help. Taking extra when your levels are already normal has not been shown to grow longer or thicker lashes.
Deficiencies that affect hair are more likely after a very restrictive diet, with certain digestive conditions, or after heavy blood loss. If you suspect one, a doctor can arrange blood tests and recommend a sensible dose. That is more useful than guessing with a multi-ingredient product.
Biotin deserves a specific warning. The FDA has cautioned that high-dose biotin can interfere with some laboratory tests and cause false results, including heart and thyroid tests. If you take biotin, tell your doctor and the lab before any blood test.
When Should You See a Doctor About Eyelash Loss?
Most lash loss is harmless and resolves once the cause stops. It is worth seeing a doctor if lashes fall out suddenly or in large numbers, if gaps do not fill in after three or four months, or if loss affects only one eye or one patch of the lid.
See a doctor sooner if lash loss comes with eyebrow loss or bald patches on the scalp, which can point to alopecia areata or a thyroid problem. Red, swollen, crusty or painful eyelids, discharge, or changes in your vision also need a prompt check. If you feel a strong urge to pull your lashes and find it hard to stop, a doctor or therapist can help.
A GP is a reasonable first stop, and they may refer you to a dermatologist or an eye doctor. Bring a note of when the loss started, any new products or extensions, and any other symptoms. That makes it much easier to find the cause and to work out whether the lashes are likely to grow back on their own.
Frequently Asked Questions
At what age do eyelashes stop growing?
Eyelashes never fully stop growing. Follicles keep replacing lashes throughout life, but with age lashes often become finer, shorter and sparser. This gradual change usually becomes more noticeable from middle age onward and affects both eyes evenly.
How many eyelashes is it normal to lose a day?
Losing 1 to 5 eyelashes a day is normal. Each lash is at a different stage of its growth cycle, so a few shed every day and are replaced. More than that, or visible gaps, is worth looking into.
Do eyelashes grow back after lash extensions?
Usually, yes. Lashes lost to extensions or glue generally regrow within about 6 to 10 weeks once you stop wearing them. Long-term, repeated traction can weaken follicles, so taking breaks and having extensions removed professionally is sensible.
Do eyelashes grow back after chemotherapy?
In most cases, yes. Lashes lost during chemotherapy usually start to regrow after treatment ends, often within a few months. They may come back slightly different in thickness or curl at first. Your cancer care team can advise on your treatment.
Does Vaseline or castor oil make eyelashes grow?
There is no good evidence that either makes eyelashes grow faster or longer. They may coat lashes and make them look glossier or feel softer. Keep any product out of the eye itself, and stop if your lids become irritated.
Can eyelashes grow back after trichotillomania?
Often, yes. Once pulling stops, lashes usually regrow on the normal cycle. Years of repeated pulling can damage follicles and cause permanent loss in some areas, so getting support early gives the best chance of full regrowth.
The Bottom Line
A lost eyelash usually grows back to full length in about 6 to 10 weeks, and a full set can take up to about 16 weeks after heavy loss. Pulled, cut and trimmed lashes normally regrow as long as the follicle is healthy. Stop whatever is causing the loss, be gentle with your lashes, and see a doctor for sudden, patchy or unexplained loss. If you want more than your natural lashes, bimatoprost (Latisse) is the only FDA-approved option.