Uneven Eyebrows: Why One Brow Sits Higher and What You Can Do
Updated: 1 day ago
Uneven eyebrows are very common, and in most people they are completely normal. Faces are not perfectly symmetrical, so small differences in the height, shape or arch of the two brows usually come from differences in bone, soft tissue, how you use your forehead muscles, or how the brows have been shaped. Grooming and make-up can make a natural difference much less noticeable. A difference that is new, that changes quickly, or that comes with a drooping eyelid, weakness on one side of the face or eye symptoms needs medical advice.
Juvenology Clinic in Maidstone, Kent, is run by its founder, Marina Kostadinova-Yankova, an NMC-registered nurse. The sections below cover why eyebrows can be uneven, what you can change yourself, when treatment might come up and which signs need a doctor.
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Are uneven eyebrows normal?
Yes. Mild facial asymmetry is a normal part of how faces grow [1, 2], and the brows and eyelids are no exception. [3] In one study of 100 adults assessed for eyelid surgery, 93 had at least one brow or eyelid measurement that differed between the two sides by more than 1 mm, and 75 by more than 2 mm. [3] There is no agreed "normal" measurement, and perfect symmetry is not a realistic or medically necessary goal.
"Uneven" can mean several different things:
one brow sitting higher than the other
a different shape or a higher arch on one side
the inner or outer ends sitting at different levels
a difference that only shows when you raise your eyebrows, frown or smile
one eye looking smaller because of the eyelid underneath
Uneven brows often look more obvious with a particular expression, light from one side or a tilted head, and close-up photos distort facial proportions. [4, 5] A selfie can make a small difference look bigger than it is.
It also helps to ask whether the difference is long-standing or new. A difference you have always had, with no other symptoms, is usually part of your normal face. One that is new, changing or getting worse is worth having checked.
Why are my eyebrows uneven?
Uneven eyebrows usually come from natural facial asymmetry, from using the forehead muscle more on one side to lift a heavier eyelid, or from plucking the two brows differently. Thinning brow hair, ageing, a recent upper-face treatment and, less often, nerve or other medical causes can also play a part. Most people have more than one cause.
Natural facial asymmetry
The bones and soft tissues of the face are rarely identical on both sides [1, 2], and small differences between the brows and eyelids are common. [3] These differences are usually lifelong and need no treatment.
How you use your forehead muscles
Brow position depends on a balance between muscles that lift the brow and muscles that pull it down. [6]
The muscle that lifts: the frontalis, the broad muscle across the forehead, is the only muscle that raises the eyebrows. [6, 7]
The muscles that lower: the corrugator and procerus pull the inner brows down and together when you frown, and the orbicularis oculi, the ring of muscle around the eye, can pull the outer brow down. [6, 7]
If you use your forehead to lift a heavy eyelid on one side, without realising it, that brow can sit higher than the other. [7, 8, 9] The forehead lines guide explains how the forehead muscles shape lines and brows in more detail.
Grooming and over-plucking
Shaping one brow more than the other, over-plucking, or waxing at a slightly different angle on each side is a common reason brows look uneven. This changes the shape of the brow hair, not the position of the brow itself, so it is usually fixable with time and careful grooming.
Thinning or loss of brow hair
Patchy or thinning brow hair can make one side look shorter or lower. Sometimes there is a medical cause. Frontal fibrosing alopecia, for example, can cause hair loss along the front of the scalp and from the eyebrows, mostly in women after the menopause. [10] Brow hair that thins without plucking, or does not grow back, is worth showing to your GP.
Changes with age
Ageing changes the skin, the supporting tissue and the eyelids, but brows do not all drop in the same way. Some studies have found that, on average, eyebrows sit slightly higher in older adults than in younger ones. [11, 12] One explanation is that some people use their forehead muscle more to compensate for heavier eyelids. [7] A lower brow can also push skin down onto the eyelid, making that side look heavier. [19]
After an aesthetic treatment
Some upper-face treatments change the balance between the forehead muscles. If the effect differs between the two sides, or between the inner and outer forehead, the brows can sit or move differently. [13] An outer brow that sits noticeably higher than the inner brow, giving a sharply arched or surprised look, is sometimes informally called a "Mephisto" or "Spock" brow. [14, 15] Treatment can also make a difference that was already there more noticeable. [13] The section on brow changes after treatment explains what to do.
Nerve and other medical causes
Weakness of the muscles on one side of the face can make one brow sit lower or move less. [7] Bell's palsy causes weakness on one side of the face, often with a drooping eyelid or corner of the mouth. The NHS advises an urgent GP appointment or NHS 111 if you have its symptoms, because treatment works best when started early. [16] Face drooping on one side can also be a sign of stroke, which needs a 999 call. [17]
Brow, eyelid or skin? Three different problems
Three different problems can all make one eye look heavier or smaller, and they need different assessments.
Problem | What it is | What it can look like |
Brow ptosis | The eyebrow sits lower than usual | A heavy or hooded look; the brow crowds the upper eyelid |
Eyelid ptosis | The upper eyelid itself droops, because the muscle that lifts it is weaker or affected | The edge of the eyelid sits lower over the eye; one eye can look smaller |
Dermatochalasis | Loose, extra skin on the upper eyelid | Skin folding over the eyelid crease; can reduce side vision |
The upper eyelid is lifted by a different muscle from the brow, supplied by a different nerve, so the brow and eyelid can change independently. [6, 18] The three problems often occur together, and a raised brow can hide a drooping lid. [7, 8, 19] An examination is needed to tell them apart.
How to make uneven eyebrows look more even
If your brows are naturally uneven and you have no other symptoms, start with grooming and make-up. These change how the brows look, not where the brow sits.
Map your brows before you shape them
Before plucking, threading or filling in, use a straight edge such as a pencil to mark where each brow should start, arch and end. Common guides are a line from the side of the nose straight up for the start, through the centre of the pupil, looking straight ahead, for the arch, and from the side of the nose past the outer corner of the eye for the end. Mark both brows before you change either, and check them in daylight from arm's length rather than close up.
Let over-plucked brows grow back
If one brow has been over-plucked, leave it alone so the hairs can grow back before you reshape the other side to match. Removing more from the fuller side can make both brows thinner than you want, so it is worth waiting for the regrowth.
Professional shaping, tinting and lamination
A brow technician can shape both brows together, which is often easier than balancing them yourself in a mirror. Tinting makes fine or fair hairs more visible, and brow lamination sets the hairs in one direction so the shape looks fuller and more even. Lamination and tints use chemical products near the eyes, so ask about a patch test first. Juvenology does not offer brow shaping, tinting or lamination.
Brow make-up
A brow pencil, powder or tinted gel can fill sparse areas, extend a shorter tail and even out the arch. Start with the brow you are happier with, then match the other side to it. Make-up is temporary and does not change brow position.
Semi-permanent make-up (microblading)
Microblading and other semi-permanent brow techniques are forms of cosmetic tattooing that place pigment in the skin to build the appearance of brow hair. They fade over time but are not easily reversed, and they break the skin.
Do facial exercises help?
There is no good evidence that facial exercises change brow position. Research on facial exercises in general is limited. [20]
Can uneven eyebrows be corrected?
It depends on the cause, whether there are any symptoms, and what you would like to change. Improving how symmetrical the brows look is a different goal from treating a medical problem, and sometimes the most useful answer is that no treatment is needed.
A natural difference with no symptoms: grooming and make-up are usually the first step. If you are thinking about any medical treatment, a face-to-face assessment with a suitably qualified clinician comes first, and no treatment is always an option.
A lowered brow or heavy eyelids that affect your vision: an eye specialist (ophthalmologist) or a plastic surgeon may assess you, and a brow lift or eyelid surgery may be considered in selected cases. On the NHS, eyelid surgery is usually only offered when a visual field test shows your vision is affected; otherwise it is treated as cosmetic. [21, 22] Juvenology does not provide surgery.
A drooping upper eyelid: this needs a GP or eye specialist, urgently if it came on suddenly. Forehead treatment and grooming do not correct it.
If your brows change after a treatment
A change in the brows after an upper-face treatment has several possible explanations: a change in muscle balance, a lowered brow, a drooping eyelid, or a difference that was there before and is now more noticeable. [13, 23] The cause cannot be reliably worked out from a photograph.
How long it lasts. Changes usually appear within the first week or two. [13, 24] An eyelid droop often settles within 3 to 4 weeks and a lowered brow within about 6 weeks, although a droop can last as long as the treatment's effect. [13] In trial data, the typical duration was about 4 weeks for an eyelid droop and about 6 weeks for a lowered brow. [24] These are typical figures, not a guarantee.
What to do:
Check the warning signs in the next section first.
Contact the clinic that treated you promptly, even if the change seems minor. You do not need to wait for a review date. Juvenology patients can check when to contact the clinic after treatment.
Say what looks different, at rest and when you move your face, when you noticed it, and whether it is changing.
Have the treatment date, the area treated and the product, if you know it, ready.
Avoid self-treatment, and do not have another procedure elsewhere until the change has been assessed.
Whether anything further is appropriate is a clinical decision after review. It may not help, it can make things worse, and it never corrects a drooping eyelid.
When to get urgent medical help
Most uneven brows are cosmetic. A new eyelid droop, eye symptoms or weakness should never be assumed to be "just the brows", because they can have serious causes, including stroke. [25]
If you notice | What to do |
In the 4 weeks after an injectable treatment to the forehead or around the eyes: difficulty swallowing, speaking or breathing, slurred speech, blurred or double vision, new muscle weakness, or severe drooping of the upper eyelids | Call 999. Tell them about the treatment and the product if you know it [26, 27] |
Face drooping on one side, arm weakness or speech problems | Call 999 (possible stroke) [17] |
Sudden loss of vision, or sudden severe eye pain | Go to A&E or call 999 [28] |
An eyelid that droops suddenly, or an eye you cannot open or keep open | Get help the same day: an urgent GP or optician appointment, or NHS 111. Call 999 if it comes with a severe headache, double vision, face drooping, weakness, or difficulty speaking or swallowing [29, 25] |
Weakness on one side of the face without the stroke signs above | Urgent GP appointment or NHS 111 [16] |
A mild droop or brow change after treatment, with none of the symptoms above | Contact the clinic that treated you promptly |
Rare cases of botulism have been reported after the injectable treatments described in the first row of the table. Symptoms usually start between 4 and 8 days after treatment but can take up to 4 weeks, and need immediate medical attention. [27]
What a brow assessment involves
A useful assessment looks at more than the brows. It may include brow position at rest and when you raise them, frown and close your eyes, along with the position and movement of the upper eyelids and how much you use your forehead to lift your brows. It also takes in earlier photographs, where you have them, previous treatments, your medical history and medicines, any effect on your vision, and what you would like to change, if anything. Lighting, head position and expression all change how a face looks, so photographs taken in the same conditions are needed to compare like with like. [5]
Frequently asked questions
Is it normal for one eyebrow to be higher than the other?
Yes. Most people have some difference between their brows, which can come from bone structure, soft tissue and muscle use. [1, 3, 6] A long-standing difference with no symptoms is usually just part of your face.
Can uneven eyebrows fix themselves?
A difference caused by over-plucking often improves as the hair grows back, and a brow change after an upper-face treatment usually settles over the following weeks. [13] A natural difference in brow position does not change by itself.
How can I fix uneven eyebrows at home?
Map both brows before you shape them, let over-plucked areas grow back, and use a brow pencil or powder to balance the shape. Make-up changes how the brow looks, not where it sits.
Do uneven eyebrows get worse with age?
Not necessarily. Brows do not all drop with age, and some studies have found they sit slightly higher on average in older adults. [11, 12] A lower brow on one side can make that eyelid look heavier.
Can surgery correct uneven eyebrows?
Sometimes, in selected cases. A brow lift or eyelid surgery is considered by an eye specialist or plastic surgeon, usually when a low brow or heavy eyelid affects your vision. On the NHS, eyelid surgery is usually only offered when a visual field test shows your vision is affected. [21, 22] Juvenology does not provide surgery.
Are asymmetrical eyebrows a sign of a medical problem?
Usually not. See a doctor if the difference is new, came on suddenly, or comes with a drooping eyelid, weakness on one side of the face, eye symptoms, or brow hair loss without plucking.
Is a brow change after treatment always a complication?
No. It may reflect the treatment's effect on muscle balance, or a difference that was there before. Contact the clinic that treated you so it can be assessed.
Talking it through at Juvenology in Maidstone
A consultation at Juvenology Clinic, 82 King Street in Maidstone, gives you time to talk about uneven brows. It covers your brows, eyelids and forehead, your history and any previous treatment, and what may be causing the difference. It also helps you decide whether grooming, a medical opinion, a treatment or nothing at all is the most sensible next step. You do not need to choose a treatment before booking, and there is no obligation to go ahead.
The in-person consultation costs £50 for 30 minutes. If you would rather talk first, you can request a free discovery call on WhatsApp; it helps you choose the next step but is not a clinical assessment. If Juvenology treated you and you have noticed a change, please contact the clinic promptly on 07413 138 825 or at office@juvenology.co.uk. For forehead and frown lines more generally, see the guide to forehead and frown lines, and the lines and wrinkles consultation page explains how that consultation works.
About the author
Marina Kostadinova-Yankova is the founder of Juvenology Clinic in Maidstone, Kent. She is a registered nurse with the Nursing and Midwifery Council (NMC) and has more than 25 years of nursing experience. She is listed with the Joint Council for Cosmetic Practitioners (JCCP), is a member of the Royal College of Nursing, and has trained in aesthetic injectables with ACE Group and Derma Medical. Read more about Marina.
This article is general information and does not replace individual medical advice. If you have any of the warning signs above, seek medical help at the level shown. Information was checked in October 2026.
References
De Jong R, Hohman MH. Brow ptosis. StatPearls. Updated 15 September 2025.
British Oculoplastic Surgery Society. Ptosis (drooping) of the upper eyelid.
King M. Management of ptosis. J Clin Aesthet Dermatol. 2016;9(12):E1–E4.
EyeWiki (American Academy of Ophthalmology). Dermatochalasis.
Maidstone and Tunbridge Wells NHS Trust. Ptosis: information for patients. March 2024.
North American Neuro-Ophthalmology Society. Droopy eyelids (ptosis): patient information.
