Article: Eyelash and Eyebrow Hair: Why They Thin and How to Care for Them
Eyelash and Eyebrow Hair: Why They Thin and How to Care for Them
Eyelashes and eyebrows are hair, and they follow the same growth cycle as the hair on your head. They stay short because their growing phase lasts weeks rather than years. Most lash and brow thinning comes from handling rather than from anything internal: tweezing, extensions, glue, and dragging at your eyes when you take makeup off. The fix is almost always gentler handling and patience, because a brow takes months to come back.
Key Takeaways
- Lashes and brows are hair, with the same three phase cycle as scalp hair.
- They stay short because the growing phase is short, roughly one to two months against two to six years for scalp hair. That length limit is built in and no product changes it.
- Most thinning is mechanical. Over tweezing, extensions, lash glue, waxing and rough makeup removal do the bulk of the damage.
- Regrowth is slow. A lash takes roughly one to three months to return, a brow often three to six. Judge nothing before then.
- Never put hair products, oils or castor oil near your eyes. The eye is not a scalp and this is where home remedies cause real harm.
- Some lash lengthening products are licensed medicines, not cosmetics. If a product promises dramatic growth, ask a pharmacist what it actually is before buying it.
- Sudden loss of lashes or brows, or patchy loss, deserves a GP visit, since thyroid conditions and alopecia areata can show up here first.
Lashes and brows get talked about as makeup, but biologically they are hair follicles doing exactly what the follicles on your head do, on a much shorter timetable. Understanding that timetable explains nearly everything people find frustrating about them: why they will not grow past a certain length, why a brow you over plucked in your twenties never quite came back, and why any product that promises a transformation in two weeks is selling you something.
Why lashes and brows stay short
Every hair follicle cycles through three phases. It grows (anagen), it transitions and shuts down (catagen), then it rests before shedding and starting again (telogen). The only thing that decides how long a hair can get is how long it stays in the growing phase.
| Hair | Roughly how long it grows for | What that means in practice |
|---|---|---|
| Scalp hair | About two to six years | Can reach waist length, because it simply keeps going. |
| Eyebrow hair | About one to two months | Reaches a set length then stops and sheds. This is why brows do not need cutting the way hair does. |
| Eyelash hair | About one to two months | The shortest cycle on the face. You lose a few lashes most days without noticing. |
This is the honest answer to the most common question in the category. Your lashes are not short because you are doing something wrong. They are short because the follicle switches off after a few weeks. Nothing in a cosmetic changes that ceiling.
It also explains the shedding. Losing a lash or two a day is completely normal and is the cycle working. The same principle governs scalp hair, and if you want the fuller version of how that cycle behaves when something disrupts it, our guide to what causes telogen effluvium and how long recovery takes covers it properly.
What actually thins lashes and brows
Ranked roughly by how often it is the real culprit.
| Cause | What is happening | Reversible? |
|---|---|---|
| Over tweezing and waxing | Repeated trauma to the follicle over years. The most common cause of permanently sparse brows. | Often only partly. Decades of plucking can retire a follicle for good. |
| Lash extensions | The weight of the extension plus the glue pulls on a natural lash that was never built to carry it. This is traction, the same mechanism as a too tight ponytail. | Usually yes, if you stop in time. |
| Rough makeup removal | Rubbing and dragging at waterproof mascara physically pulls lashes out. | Yes, and quickly. |
| Eyelash curlers | Especially used on mascara that has already dried, which glues lashes to the pad and rips them out. | Yes. |
| Old mascara and eye rubbing | Irritation and friction, often from allergies or hay fever. | Yes. |
| Ageing | Follicles gradually produce finer, paler hairs, and some stop. Brows thin at the tails first. | No, but gentle handling keeps what you have. |
| Nutrition | Genuine deficiency affects all hair, lashes included. Worth checking rather than assuming. | Yes, once the cause is identified. |
| Thyroid conditions | Thinning at the outer third of the brow is a recognised sign. | Usually, once the cause is being managed. See a GP. |
| Alopecia areata | Sudden, patchy loss including lashes and brows. | Varies. This is a medical matter, see a GP. |
The pattern worth noticing. Almost everything at the top of that table is something being done to the hair rather than something happening inside the body. That is good news, because handling is the one variable you fully control. Change the handling and most people see the difference within one cycle.
How to look after lashes and brows
- Soak, do not scrub. Hold a damp pad against closed lashes for twenty to thirty seconds so the makeup dissolves, then wipe once, downwards. Most lash loss at the basin is impatience.
- Reconsider waterproof mascara as an everyday product. It is designed not to come off, which means removing it takes force. Save it for when you need it.
- Curl before mascara, never after. Clamping a curler onto drying mascara is the single most reliable way to pull out a row of lashes.
- Give extensions a break. If you wear them continuously, build in rest periods. Traction damage accumulates quietly and is noticed late.
- Put the tweezers down. If you are growing brows back, stop entirely for at least three months. You cannot assess a brow you keep tidying.
- Brush brows daily with a clean spoolie. It trains the direction and makes a sparse brow look fuller straight away, which is the fastest visible win here.
- Keep the lash line clean. Crusting, persistent redness or itching at the lid margin is worth showing to a pharmacist or optometrist rather than covering with more makeup.
- Replace mascara regularly. Roughly every three months. Old mascara is an irritation and hygiene problem.
Please do not put oils or hair products near your eyes. Castor oil, coconut oil, hair serums and shampoos all get recommended for lashes online. None of them belongs near an eye. Oils can blur vision, irritate the eye surface, disturb the natural oil layer of the tear film and cause a reaction on very thin eyelid skin. Nothing we make is for use on or near the eyes either. If you want something for lashes, it should be a product made and tested for the eye area, and anything to do with your eyes or your vision is a question for an optometrist or GP, not a hair care company.
What about lash serums?
Worth understanding the split before you spend anything.
Some lash lengthening products are licensed medicines and are only available with a prescription in the UK. They are not cosmetics, they carry recognised side effects including changes in eyelid skin colour, and they are supervised for a reason. Others sold over the counter are cosmetic conditioners: they coat and condition the lash you already have, which can make it look glossier and less brittle, but they are working on the visible hair rather than on the cycle.
Two practical points. First, if a product is promising a dramatic change in lash length, ask a pharmacist what category it actually falls into before buying it, particularly if you are buying from overseas sellers where the rules differ. Second, judge any of it against the cycle above: a lash lives for weeks, so nothing can show you a real result in a fortnight.
Growing brows back after over plucking
This is the most common brow question and it deserves a straight answer: partly, usually, and slowly.
- Give it three to six months before you judge anything. Brow follicles cycle slowly and they do not all restart together, which is why regrowth looks patchy and uneven for a while.
- Stop all removal in that window. No tweezing, no waxing, no threading, including the strays that bother you. Those strays are the regrowth.
- Expect the new hairs to look wrong at first. They often come through fine, pale and pointing in odd directions. Brushing them daily helps them lie down.
- Accept the ceiling. Follicles damaged over many years may not restart at all. Where that is the case, makeup, tinting or a professional treatment such as microblading is a cosmetic answer rather than a failure on your part.
- If nothing at all returns after six months, or the loss is patchy and sharply defined, see a GP rather than buying another serum.
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When lash or brow changes are worth a GP visit
Most of the time this is a handling problem. Sometimes it is a signal, and these are the situations where it is worth being seen rather than shopping.
- Loss of the outer third of the eyebrow, particularly alongside tiredness, weight change, feeling cold or dry skin. Thyroid conditions are checked with a simple blood test.
- Sudden, patchy, sharply defined loss of lashes, brows or scalp hair together.
- Loss alongside shedding elsewhere, which points at something affecting all your hair rather than the eye area.
- A red, crusted, sore or persistently itchy lid margin. An optometrist or GP, not a cosmetic.
- Any change in vision, eye pain or discharge. That is always a medical matter and nothing on this page applies to it.
- Lashes or brows lost during a course of medical care. Speak to the team looking after you.
If shedding is happening on your head as well, working out which pattern you are dealing with is the useful first step, and our guide to how to identify what is behind your hair thinning walks through it. On the nutrition side, our guide to the vitamins and minerals that genuinely matter for hair separates what is worth checking from what is marketing.
If your real concern is the hair on your head
Plenty of people arrive at lashes and brows when what is actually bothering them is scalp hair getting finer or breaking. That is a different problem with different answers, and it is the one we are qualified to help with.
The honest cosmetic goal there is keeping the length you grow. Most people are not failing to grow hair, they are losing it partway along to breakage, so their hair never reaches the length it used to. Reducing that breakage is what makes hair look thicker and fuller over a few months.
Grow Me® Shampoo, £14.95
A sulphate free shampoo for the scalp, with biotin, caffeine, rosemary, niacinamide and hydrolysed lupine protein. It supports a healthy scalp environment and reduces breakage so hair looks fuller. Vegan and made in the UK.
For scalp hair only. Not for lashes, brows or anywhere near the eyes.
Condition Me® Conditioner, £13.95
The breakage defence half of the pair. It softens and detangles so combing and brushing pull less, which is where a lot of length is lost. Vegan and made in the UK.
For scalp hair only. Keep away from the eye area.
Frequently asked questions
How long does it take for eyelashes to grow back?
Usually one to three months for a lash lost normally. If the follicle was damaged by glue, extensions or repeated pulling it can take longer, and occasionally a follicle does not restart. Because lashes are on different points of the cycle, they come back unevenly rather than all together.
Why will my eyelashes not grow longer?
Because their growing phase lasts only about one to two months, against years for scalp hair. That sets a natural ceiling on length. It is not something you are doing wrong and no cosmetic changes it.
Is it normal to lose eyelashes every day?
Yes. Losing a few most days is the cycle working normally. What is worth attention is a noticeable thinning of the whole lash line, patchy gaps, or losing lashes alongside brow or scalp hair.
Can I use castor oil on my eyelashes?
We would not. It is one of the most repeated pieces of internet advice and one of the worst ideas on this page. Oils near the eye can blur vision, irritate the eye surface and disturb the tear film, and eyelid skin reacts easily. Use something made and tested for the eye area, and ask an optometrist or pharmacist if unsure.
Do lash serums work?
It depends entirely on what is in the bottle. Some lash lengthening products are licensed medicines available only on prescription and supervised because of recognised side effects. Over the counter cosmetic versions condition the lash you already have, which can improve how it looks without changing the cycle. Ask a pharmacist which category a product falls into.
Will my eyebrows grow back after years of plucking?
Partly, usually, and slowly. Allow three to six months with no tweezing, waxing or threading at all. Follicles damaged over many years may not restart, in which case makeup, tinting or microblading is a reasonable cosmetic answer.
Do lash extensions damage your natural lashes?
They can. The weight of the extension and the glue pull on a natural lash that was not built to carry it, which is traction damage, the same mechanism as a tight ponytail. Build in rest periods and go to someone who applies them properly.
Can thinning eyebrows be a sign of a health problem?
Sometimes. Thinning at the outer third of the brow is a recognised sign associated with thyroid conditions, and sudden patchy loss can indicate alopecia areata. If either sounds like you, particularly with tiredness, weight change or shedding elsewhere, see a GP. It is a simple thing to check.
Does what I eat affect my lashes and brows?
Genuine nutritional deficiency affects all hair, lashes and brows included. That is different from taking supplements on the assumption you are short of something. If you suspect a deficiency, ask your GP to check rather than guessing.
Can I use hair growth shampoo on my eyebrows?
No. Our products, and hair products generally, are made for the scalp and are not tested for use near the eyes. Keep them well away from the eye area.
The short version
Lashes and brows are hair on a short clock. They will not exceed the length their cycle allows, they shed a little every day, and the fastest improvement almost everyone can make is to stop pulling at them. Be gentle taking makeup off, leave the tweezers alone for a season, brush your brows daily, and give it a full cycle before judging. Keep oils and hair products away from your eyes, and take patchy or sudden loss to a GP rather than to a shopping basket.
Watermans is a family run British business making vegan, cruelty free hair care in the UK, with over 5 million bottles sold since 2012. We make products for the scalp and hair on your head, not for the eye area, and we would rather say so than sell you something unsuitable.
Watermans products are 100% cosmetic and do not treat medical hair loss. Individual results may vary.
This article is for general information and covers cosmetic care only. It is not medical advice. Anything involving your eyes, your vision, or sudden or patchy hair loss should be taken to a GP, optometrist or pharmacist.
