How to Stop Furrowing Your Brow While Sleeping

Furrowing your brow during sleep is almost entirely involuntary, and research suggests it happens to nearly everyone. A sleep-laboratory study using video and muscle-activity monitoring found frowning in about 98% of the adults recorded, including completely healthy sleepers with no known disorders.¹ So the challenge is less about eliminating something abnormal and more about dialing down a habit your face performs on its own while you are unconscious. That said, there are real strategies that can help, and a few underlying causes worth investigating if the problem is severe.

Why Your Face Frowns While You Sleep

The muscle responsible is the corrugator supercilii, a small strip that runs along the inner edge of each eyebrow. When it contracts, it pulls the brows inward and downward, creating that vertical crease between the eyes. During waking life, you activate it when you concentrate, squint, or feel frustrated. During sleep, the same muscle fires on its own in brief bursts, especially during lighter sleep stages and transitions between stages.

In the sleep-lab study mentioned above, the most common events in healthy sleepers were brief, isometric corrugator activations. These are tiny contractions that do not produce a visible frown but still generate measurable electrical activity. True, sustained frowns were rarer but still occurred regularly.¹ Research on other involuntary facial movements during sleep, like jaw twitching, has found that the overwhelming majority of these events happen during non-REM sleep and are linked to micro-arousals, the brief, partial awakenings your brain cycles through dozens of times per night.² Your corrugator muscle likely follows a similar pattern, tensing during these momentary shifts in brain state rather than staying clenched for hours straight.

Stress Is the Biggest Modifiable Driver

If you consistently wake up with a sore forehead or deep furrow marks, daytime stress is the first place to look. Chronic stress ramps up baseline muscle tone across the face and jaw. The research on bruxism, the involuntary clenching and grinding of the jaw during sleep, illustrates this clearly: stress is the most widely accepted trigger, and the condition affects more than a third of the population at some point in life.³ The same stress-driven loop that clenches your jaw applies to your forehead. People who carry tension in their face during the day tend to carry it at night too, because elevated muscle tone does not switch off cleanly the moment you fall asleep.

This is useful information because it means that anything genuinely effective at lowering your stress level during the hours before bed has a real chance of reducing nighttime brow tension. The list of possibilities is familiar: consistent exercise earlier in the day, limiting caffeine after midday, a wind-down routine that does not involve screens, and practices like progressive muscle relaxation or meditation. None of these will eliminate corrugator firing entirely, because as the sleep-lab data shows, even relaxed, healthy people still frown during sleep. But high-stress sleepers have more to gain from these interventions than calm ones.

Temperature, Pillows, and Sleep Position

Environmental discomfort can trigger facial muscle activity even when you are not conscious of it. Research on facial electromyography during cold exposure has shown that when ambient temperature drops to uncomfortable levels, the muscles of the face increase their activity measurably. In one study, participants showed clear increases in facial muscle tension during a cold period, and the tension decreased after their insulation improved and comfort levels rose.⁴ If your bedroom is too cold, or your face is exposed to a draft from a fan or vent, your brow muscles may be responding to the chill all night.

Your pillow also matters, but not in the way you might expect. A pillow that pushes your head into an awkward angle, forcing slight neck extension or flexion, can increase tension along the forehead and temples. There is no single “anti-furrowing” pillow on the market that has been clinically validated, but the principle is straightforward: keep your cervical spine neutral. A pillow that is too high pushes your chin toward your chest, while one that is too flat lets your head tilt backward. Both positions can cause reflexive muscle bracing in the forehead.

Sleeping position itself plays a role in a different way. People who sleep face down, pressing their skin into the pillow, develop what researchers call sleep lines, distinct wrinkles caused by prolonged mechanical compression of facial skin. A study examining these lines concluded that prone sleeping, with the face buried in the pillow for years, causes wrinkling that is separate from expression-driven wrinkles.⁵ If you sleep on your stomach or side and notice lines across your forehead that do not match the typical “eleven” furrow pattern, your pillow rather than your corrugator muscle may be the culprit.

Practical Techniques That Can Help

Because you cannot consciously control your face while asleep, every useful technique either reduces the muscle tension you carry into sleep or changes the physical conditions that provoke tension overnight. Here is what tends to work, roughly in order of how easy each one is to try.

Pre-sleep facial relaxation: Before turning off the light, spend a minute deliberately tensing your forehead as hard as you can, holding for five seconds, then releasing. Repeat two or three times. This progressive relaxation technique for the face works on the same principle as full-body versions: deliberately over-contracting a muscle makes the subsequent relaxation deeper than simply trying to “let go.” The goal is to lower the tension baseline you carry into sleep.
Forehead taping: Some people apply small strips of medical tape vertically between their eyebrows before bed. The tape provides physical resistance when the corrugator tries to contract, and it also creates a proprioceptive cue, a gentle pull you can feel even in light sleep, which may reduce the frequency or intensity of contractions. This has not been studied in controlled trials, but many dermatologists recommend it as a low-risk method.
Silk or satin pillowcases: These reduce friction between your face and the pillow surface, which matters most for preventing mechanical sleep lines. They will not stop the corrugator muscle from firing, but they reduce the likelihood that a furrowed brow gets “imprinted” by a high-friction cotton pillowcase while the muscle is contracted.
Sleep position training: If you are a stomach sleeper, switching to your back removes the pillow-compression factor entirely. Training yourself to sleep on your back is notoriously difficult, but a common trick is to place pillows on either side of your body to discourage rolling over.
Room temperature adjustment: Based on the cold-exposure research, keeping your bedroom comfortably warm and avoiding drafts on your face can reduce reflexive facial muscle tension. Most sleep experts recommend a room temperature in the mid-60s Fahrenheit, which is cool enough for good sleep quality without being cold enough to trigger facial bracing.

Does Biofeedback Work for This?

Biofeedback, where sensors on your forehead give you real-time feedback about muscle tension so you can learn to relax those muscles, sounds like a logical solution. And for daytime tension, it can be genuinely useful: people with chronic forehead tension headaches, for example, sometimes benefit from EMG biofeedback training that teaches them to lower their corrugator and frontalis muscle activity.

The limitation is that biofeedback works by making you aware of tension so you can consciously override it, and consciousness is exactly what you do not have during sleep. One study specifically looked at whether reducing frontalis EMG activity through biofeedback helped with sleep problems. The researchers found that improvements in falling asleep were not significantly related to reductions in forehead muscle activity.⁶ That finding suggests the connection between conscious forehead relaxation and what your muscles do once you are asleep is weaker than you might hope. Biofeedback is not useless here, because lowering your daytime baseline tension may carry over somewhat into sleep, but it is not the targeted fix it appears to be.

Botox and the Cosmetic Route

Botulinum toxin injections into the corrugator muscle are, in a strictly mechanical sense, the most effective way to stop brow furrowing during sleep. Botox blocks the nerve signals that tell the muscle to contract, so the muscle simply cannot furrow, day or night. The standard cosmetic injection site for “frown lines” is the glabellar region, exactly where the corrugator lives, so anyone who has had Botox for the vertical forehead crease has already experienced the effect.

A typical treatment lasts three to four months before the nerve signals begin returning. Some people who get regular injections over several years report that the muscle partially atrophies from disuse, meaning the furrow becomes less pronounced even between treatments. This is not a guaranteed outcome, and the degree of atrophy varies from person to person.

The trade-off is cost and the usual risks of any injection: bruising, occasional headaches, and in rare cases, slight drooping of the brow if the toxin migrates. For people whose primary concern is wrinkle prevention rather than comfort, Botox addresses both the daytime and nighttime contribution simultaneously. For people who furrow hard enough to wake themselves up or cause headaches, it can genuinely improve sleep quality, though this use is off-label and not widely studied in sleep medicine.

When Brow Furrowing May Signal Something Else

Occasional furrowing is normal and harmless. But if you wake up every morning with forehead pain, jaw soreness, or a partner tells you that your face looks tense throughout the night, a few medical causes are worth considering.

Sleep bruxism is the most common one. Jaw clenching and grinding do not just affect the jaw; the tension radiates upward into the temples and forehead. People with bruxism often furrow intensely as part of a broader pattern of facial muscle overactivity. Stress is the primary driver, but bruxism can also be linked to sleep apnea, certain medications (especially SSRIs), and alcohol consumption.³ A dentist can check for tooth-wear patterns that confirm bruxism, and a night guard can reduce jaw clenching, which may secondarily lower forehead tension.

Magnesium deficiency is another possibility that often flies under the radar. Magnesium plays a central role in muscle relaxation, and deficiency can cause a wide range of neuromuscular symptoms, including muscle twitching, cramps, and involuntary jerks.⁷ If you are experiencing nighttime muscle tension alongside other signs like leg cramps, eye twitching, or general restlessness, it is worth asking your doctor to check your magnesium level. Supplementation with magnesium glycinate or magnesium citrate before bed is commonly recommended for sleep-related muscle tension, though the evidence for this specific application is mostly anecdotal rather than backed by large trials.

Obstructive sleep apnea can also contribute. When your airway partially closes during sleep, your body mounts a micro-arousal response to resume breathing, and these arousals are precisely the events during which facial muscles tend to fire. People with untreated apnea cycle through dozens or even hundreds of these arousals per night, giving the corrugator muscle far more opportunities to contract than it would get during uninterrupted sleep. If you snore, wake up feeling unrefreshed despite enough hours in bed, or have been told you stop breathing at night, a sleep study is worth pursuing for reasons that go well beyond forehead wrinkles.

The Wrinkle Question

Many people searching for ways to stop nighttime brow furrowing are motivated by wrinkle prevention rather than discomfort. The concern is valid: repeated muscle contraction is one of the two main mechanisms behind facial wrinkles. Every time the corrugator fires, it creases the overlying skin, and over years, the collagen in that crease breaks down and the line becomes permanent. This is how expression lines form, both from daytime habits like squinting and from whatever your face does overnight.

Sleep lines, by contrast, form through a different mechanism. These are caused by external pressure from the pillow compressing the skin, and they tend to appear in patterns that do not follow the corrugator muscle’s pull direction. Researchers have specifically identified prone sleeping as a cause of facial wrinkles that develop over many years of consistent pillow contact.⁵ If you sleep on your stomach or side, both types of wrinkle formation may be happening simultaneously: the corrugator is furrowing the skin from underneath while the pillow is creasing it from above.

For wrinkle prevention specifically, back sleeping is the single most effective positional change. It eliminates pillow compression entirely and removes the gravitational pull that deepens furrows when you sleep on your side. Combined with a pre-sleep relaxation routine to lower corrugator tone, this addresses both wrinkle-formation pathways at once. Adding a retinoid cream to your nighttime skincare routine can further help by stimulating collagen production in the skin overlying the muscle, making the skin more resilient to repeated creasing.

What You Cannot Fully Control

It is worth being honest about the limits here. The sleep-lab finding that nearly all adults frown during sleep, including healthy people with no stress complaints, means some degree of nighttime corrugator activity is simply part of normal sleep architecture.¹ Your brain cycles through stages that include brief arousals, and during those arousals, your facial muscles twitch. You can reduce the frequency and intensity, especially if stress or environmental discomfort is amplifying the problem, but zeroing it out entirely without pharmacological intervention like Botox is probably not realistic.

Dream content may also play a role that you have limited control over. During REM sleep, when vivid dreaming occurs, your brain sends motor signals that are mostly blocked by a natural paralysis mechanism, but the face is partially exempt from this blockade. Emotional dream content, especially negative emotions, may produce corrugator activation that you cannot influence through any bedtime habit. Reducing nightmare frequency through stress management or, in more severe cases, through imagery rehearsal therapy can help indirectly, but the connection between dream content and facial expression during sleep remains an area where the science is still evolving. The researchers behind the sleep-lab frown study explicitly framed their work as exploring whether frowns during sleep reflect negative emotion, suggesting this question is far from settled even among specialists.

1
PubMed. Grumpy face during adult sleep: A clue to negative emotion during sleep?
2
PubMed Central. Tongue Biting Event in Patients with Sleep-Related Facial Mandibular Myoclonus: A Case Series Study
3
PubMed Central. Neurobiology of bruxism: The impact of stress
4
Building and Environment. Characteristics of facial electromyography during cold exposure and feasibility of evaluating thermal comfort
5
PubMed. A new phenomenon: “sleep lines” on the face
6
British Journal of Medical Psychology. Progressive relaxation, EMG biofeedback and biofeedback placebo in the treatment of sleep-onset insomnia
7
PubMed. Magnesium deficiency. Etiology and clinical spectrum