In short
- In a 2010 BMJ study, 65 observers rated photos of 23 young adults as less healthy, less attractive and more tired after a night of reduced sleep followed by 31 hours awake than after a normal night's sleep.
- A 2017 Royal Society Open Science study found that after two days of restricted sleep, 25 people were rated less attractive, less healthy and sleepier, and raters were less keen to socialize with them.
- A 2013 study in Sleep found sleep-deprived faces were seen as having more hanging eyelids, redder and more swollen eyes, darker under-eye circles, paler skin and more fine lines.
- In a 2015 study of 60 women, good sleepers had lower skin ageing scores and 30% greater skin barrier recovery at 72 hours than poor sleepers, though the study shows an association rather than cause.
- The American Academy of Dermatology says a bedroom humidifier can be especially helpful for dry lips if you breathe through your mouth at night.
Beauty sleep is real in a modest, measurable way. In controlled studies, people photographed after short or missed sleep were rated by strangers as looking more tired, less healthy and a little less attractive than after a normal night. Research on sleep and skin itself is thinner, but it points the same way. Here's what the studies found, why lips and mouths dry out overnight, and where the evidence stops.
Is beauty sleep a real thing?
Research: early (what this means)Beauty sleep is a real thing, according to a small set of experiments from Sweden. The best known is a 2010 study in the BMJ with the fitting title "Beauty sleep". Researchers photographed 23 healthy adults aged 18 to 31 twice: once after a normal eight-hour night, and once after a night of reduced sleep followed by 31 hours awake. Then 65 people who didn't know which photo was which rated them.
The sleep-deprived photos were rated as less healthy, more tired and less attractive. The differences were statistically clear but not dramatic. On a 100-point scale, attractiveness dropped from 40 to 38 and perceived health from 68 to 63, while tiredness rose from 44 to 53. Lower health ratings went along with higher tiredness and lower attractiveness ratings.
That study used an extreme amount of sleep loss. A follow-up in 2017, published in Royal Society Open Science, tried something closer to real life. 25 people aged 18 to 47 were photographed after two days of restricted sleep and after normal sleep. 122 raters judged them as less attractive, less healthy and sleepier when sleep-restricted, and said they'd be less inclined to socialize with them. Trustworthiness ratings didn't change.
What does sleep loss do to your face?
Sleep loss mostly shows around the eyes, mouth and skin tone. A 2013 study in the journal Sleep asked 40 observers to rate photos of 10 people taken in the afternoon after normal sleep, and again after a night of 5 hours' sleep followed by 31 hours awake.
The sleep-deprived faces were seen as having:
- more hanging eyelids
- redder eyes
- more swollen eyes
- darker circles under the eyes
- paler skin
- more wrinkles and fine lines
- more droopy corners of the mouth
They also looked sadder. Interestingly, ratings of rashes or eczema and of tense lips didn't change. The authors point out that the eyes, mouth and skin matter a lot in how people read each other, which may be why tired faces get noticed.
Does sleep affect your skin over time?
Poor sleep is linked to signs of skin ageing, but the evidence is limited to small studies. A 2015 study in Clinical and Experimental Dermatology compared 60 healthy women. Poor sleepers had poor scores on a standard sleep questionnaire and slept 5 hours or less; good sleepers slept 7 to 9 hours.
The good sleepers had lower scores for intrinsic skin ageing on a clinical rating tool. The poor sleepers lost more water through their skin at baseline. When researchers stripped the skin's outer layer in a standard lab test and measured how well the barrier recovered, good sleepers showed 30% greater recovery at 72 hours. Good sleepers also recovered better from redness after a dose of simulated sunlight, and rated their own appearance and attractiveness more highly.
This is a useful study, but keep its limits in mind. It looked at one group of women at one point in time, so it shows an association rather than proof that poor sleep caused the differences. Other things that go with poor sleep, such as stress or habits, could play a part. We'd like to see larger studies before treating sleep as a skin treatment.
How much sleep should you aim for?
Aim for the general adult target, since no study has set a separate number for your skin. The NHLBI lists 7 to 8 hours a day for adults, based on American Academy of Sleep Medicine recommendations. It also explains that lost sleep adds up into a sleep debt, and that while extra sleep on days off might help you feel better, it can upset your body's sleep-wake rhythm.
For appearance specifically, the photo studies above all tested short-term sleep loss and found effects within a day or two. The flip side is encouraging: if a couple of short nights can show in your face, a run of good nights is a reasonable place to start. Our guide to how much sleep adults need covers this in more detail.
Why do lips and mouths dry out overnight?
Lips and mouths dry out overnight because of dry air, habits and, for many people, breathing through the mouth. Cleveland Clinic lists cold or dry weather, sun exposure, frequent lip licking and dehydration as common causes of chapped lips. The American Academy of Dermatology adds that licking dry lips can make things worse, because as saliva evaporates the lips get drier.
Breathing matters at night. The American Dental Association notes that saliva flow is at its lowest during sleep and that mouth breathing can make dry mouth worse. The AAD specifically says a humidifier in the bedroom can be especially helpful if you breathe through your mouth at night. Our guide to dry lips in the morning goes into the causes in more depth.
| What you notice | What the research or experts say | What to try |
|---|---|---|
| Tired-looking eyes after short nights | Sleep-deprived faces were rated with darker circles and more swollen eyes | Protect your sleep across the week |
| Looking less healthy when short on sleep | Raters judged sleep-restricted faces as less healthy and attractive | Aim for 7 to 8 hours, per the NHLBI |
| Dry, cracked lips in the morning | The AAD suggests balm before bed and a thick ointment for very dry lips | Ointment at night, stop lip licking |
| Dry mouth on waking | Saliva is lowest during sleep and mouth breathing can make it worse, says the ADA | Check your nose and how you breathe at night |
| Dry bedroom air | The AAD and Cleveland Clinic suggest running a humidifier | A humidifier, kept clean |
How can you look after your skin and lips while you sleep?
Looking after your skin and lips at night comes down to a few simple steps. The AAD suggests applying a non-irritating lip balm several times a day and before bed, and a thick ointment such as white petroleum jelly if your lips are very dry and cracked, since ointments seal in water longer than waxes or oils. Cleveland Clinic says using lip ointment at night keeps lips hydrated through the night.
If you wake with a dry mouth and suspect you breathe through your mouth, encouraging nasal breathing is worth trying. Mouth tape keeps your lips gently closed so you breathe through your nose. Our pick is Titan Bamboo Silk Mouth Tape. To be clear, no study shows that mouth tape improves your skin or appearance, and we're not suggesting it does. The appeal is comfort: it's a way to encourage nasal breathing if you tend to wake with a dry mouth.
Balm and tape need a little planning, because grease stops adhesive sticking. Lip balm and mouth tape explains how to use both, and mouth tape and your skincare routine covers creams, oils and retinoids. Check your nose with our nose test before you start. We don't recommend mouth tape for children.
What can't sleep do for your looks?
Sleep can't do as much as the phrase "beauty sleep" suggests. The appearance studies used small groups of young adults in a lab, rated by strangers from photos, and the changes were modest. The skin study was observational. None of them shows that sleeping longer than you need makes you look younger, or that sleep reverses ageing.
What the research does support is simpler. Short sleep tends to show in your eyes, skin tone and expression within a day or two, and people pick up on it. Getting enough regular sleep is a sensible goal for your health anyway, and looking more rested is a pleasant side effect.
When should you see a doctor?
See a doctor if you sleep enough hours but still look and feel exhausted. The NHS says to see a GP if your breathing stops and starts while you sleep, you make gasping, snorting or choking noises, or you always feel very tired during the day, since these can be signs of sleep apnoea. Our page on sleep apnea warning signs has more.
See a doctor or dermatologist about lips that stay cracked or sore despite balm, a nose that's blocked most nights, or skin changes that worry you. If you're pregnant, ask your midwife or doctor before trying a new sleep product.
Check this first. Skip mouth tape and see a doctor if you snore loudly, wake up gasping, have been told you stop breathing in your sleep, or can't breathe comfortably through your nose. More on safety
Our pick (paid partner): Titan Bamboo Silk Mouth Tape
If you wake up with a dry mouth and want to encourage nasal breathing at night, our pick is Titan Bamboo Silk Mouth Tape. We haven't tested or ranked mouth tapes ourselves. This is our recommendation, based on how Titan describes its tape, and it's a sleep comfort product, not a skincare one.
Titan describes the strip as bamboo silk rather than kinesiology tape, soft, breathable and moisture-wicking, with no printed logo or ink on the side that touches your skin. It comes in one oval size, 76 by 38 mm, worn horizontally across the lips. For sensitive skin, Titan suggests easing in by wearing it for an hour while awake first, or starting with a smaller strip, and stopping if there's irritation.
If you try Titan Bamboo Silk Mouth Tape, Titan suggests 20 to 30 minutes of daytime practice before the first night. It says every batch is third-party tested and certified PFAS-free, and its 30-night guarantee refunds you if your sleep isn't better after 30 nights.
Read next
- Why are my lips so dry in the morning?
- How to fit mouth tape into your skincare routine
- Mouth tape for sensitive skin: what to look for
Common questions
Is beauty sleep a real thing?
There's some real evidence for it. In a 2010 BMJ study, people photographed after a night of reduced sleep and 31 hours awake were rated as less healthy, less attractive and more tired than after a normal night. The effects were modest, and the studies are small and short-term, but sleep loss does show in a face.
Does lack of sleep cause dark circles?
It can make them look darker. In a 2013 study in Sleep, observers rated photos of sleep-deprived people as having darker circles under the eyes, as well as more swollen and redder eyes, more hanging eyelids and paler skin. Dark circles also have other causes, so sleep won't erase them for everyone.
Does sleep affect skin ageing?
It may. A 2015 study of 60 women found that poor sleepers had higher scores for signs of skin ageing and slower skin barrier recovery than good sleepers. It measured an association at one point in time, so it can't show that poor sleep caused the differences, and larger independent studies are needed.
How much sleep do you need for your skin?
No study has set a sleep target for skin. The best general guide is the adult recommendation: the NHLBI lists 7 to 8 hours a day, based on American Academy of Sleep Medicine advice. In the 2015 skin study, the good sleepers slept 7 to 9 hours and the poor sleepers 5 hours or less.
Why are my lips dry when I wake up?
Dry air, cold weather and lip licking are common causes, according to Cleveland Clinic. Mouth breathing at night can add to it, and the American Academy of Dermatology says a humidifier in the bedroom can be especially helpful if you breathe through your mouth while you sleep. A thick ointment before bed also helps.
Does mouth tape improve your skin?
There's no evidence that it does, and we don't claim it. Mouth tape encourages nasal breathing by keeping your lips closed. Some people use it because they wake with a dry mouth and lips. If it helps you sleep more comfortably, that's the benefit; any effect on skin hasn't been studied.
Sources
- Beauty sleep: experimental study on the perceived health and attractiveness of sleep deprived people
- Negative effects of restricted sleep on facial appearance and social appeal
- Cues of fatigue: effects of sleep deprivation on facial appearance
- Does poor sleep quality affect skin ageing?
- Sleep deprivation and deficiency: how much sleep is enough
- 7 dermatologists' tips for healing dry, chapped lips
- Chapped lips (cheilitis)
- Xerostomia (Dry Mouth)
- Sleep apnoea
- Bamboo Silk Mouth Tape
About this article
- Research
- 10 published sources, listed above.
- Evidence
- Early. How we rate it
- Last checked
- November 3, 2026
- Funding
- Paid partner of Titan Recovery. Their ads are labeled.
- Found an error?
- Tell us. We log fixes on the corrections page.
* This content is for informational and educational purposes only and is not medical advice. It is not intended to diagnose, treat, cure or prevent any disease or health condition. Talk to a qualified healthcare provider about your health.