Last updated: October 2026
Tired but wired is when you feel exhausted but your mind or body won’t settle at night, usually because stress, late screens, caffeine or a shifted body clock keep you alert when you should be winding down. It isn’t a medical diagnosis. A steady wind-down routine, morning light and an earlier caffeine cut-off usually help.
Below: the seven common causes, what to do tonight, how to fix it for good and when to see a GP.
What does tired but wired mean?
It’s feeling tired and wired at the same time: your body is heavy, yet the moment your head hits the pillow your brain switches on. People describe:
- yawning all evening, then feeling wide awake in bed
- racing thoughts, replaying the day or planning tomorrow
- a restless body, a tight chest or a heart that feels a bit too fast
- a “second wind” late in the evening
Most people get it now and then. If it happens most nights, it may be insomnia, which the NHS describes as regularly finding it hard to get to sleep or stay asleep.
Why you feel tired but wired at night
Feeling sleepy and being able to sleep are different things. Tired but wired is what happens when you’re ready for sleep but your brain’s alert system is still on.
Your stress system is stuck on
Sleep researchers call this hyperarousal. A major review found that people with long-term insomnia show raised arousal, from hormones to brain activity, by night and by day, with worry and rumination keeping it going. As the NHS puts it, when you’re stressed or anxious, your body may feel more alert. If your nights are full of worry, see our guide to anxiety at night and sleep anxiety.
Cortisol timing
Cortisol, the main stress hormone, is normally highest in the morning and falls through the day. A small sleep lab study found that adults with chronic insomnia had higher cortisol over 24 hours than good sleepers, with the biggest rises in the evening and first half of the night. A 2017 meta-analysis of 80 studies linked a flatter daily cortisol pattern to poorer health, though the link was modest. See high cortisol symptoms.
Screens and light
In a Harvard study, people who read on a light-emitting e-reader before bed took longer to fall asleep, felt less sleepy in the evening, made less melatonin and were less alert the next morning than when they read a printed book. Scrolling adds mental stimulation on top: see doomscrolling.
Caffeine, alcohol and late nights
In one trial, a strong dose of caffeine taken six hours before bed still disrupted sleep, which is why the NHS suggests no tea or coffee for at least 6 hours before bed (see how long caffeine lasts). Alcohol helps you drop off, but sleep is more broken later in the night (see alcohol and sleep). And staying up to claw back “me time”, known as revenge bedtime procrastination, can push you past the point where you first felt sleepy.
Causes, clues and fixes at a glance
| Cause | Clue | First fix |
|---|---|---|
| Stress and hyperarousal | Racing thoughts, tense body, mind busiest in bed | Worry list in the early evening, slow breathing in bed |
| Cortisol out of step | Flat in the morning, buzzing at night, long-term stress | Morning light and movement, calmer evenings |
| Screens and light | Phone in bed, bright lights until late | Screens away and lights dimmed an hour before bed |
| Caffeine | Coffee, tea, cola or energy drinks after lunch | Last caffeine at least 6 hours before bed |
| Alcohol | Drop off fast, then wake at 3am | Fewer drinks, and none close to bedtime |
| Revenge bedtime procrastination | Stay up scrolling to get time for yourself | Plan “me time” earlier in the evening |
| Late body clock | Sleepy at 2am, groggy at 7am, worse after weekend lie-ins | Same wake time every day, daylight soon after waking |
If you wake in the small hours instead, see why you wake up at 3am. If you’re a natural night owl, see how to reset your circadian rhythm. Feeling wired at night is also common with ADHD and in perimenopause: see ADHD and sleep and perimenopause and sleep.
Is it adrenal fatigue?
Probably not. “Wired but tired” is often sold online as a sign of adrenal fatigue, but adrenal fatigue isn’t a recognised medical condition, and saliva tests for it aren’t reliable. The tiredness is real, though, and usually has an everyday cause or a medical one your GP can test for. We explain the evidence in is adrenal fatigue real?
How to fix it tonight
- Dim the lights and put your phone in another room an hour before bed.
- Empty your head. Write down what’s on your mind and one next step for each item, so your brain doesn’t have to hold it overnight.
- Do something calming: a warm shower, a paper book or gentle stretches.
- Slow your breathing in bed. Try 4-7-8 breathing, with a longer breath out than in.
- Don’t fight it. If you can’t settle after about 20 minutes, get up, go somewhere dim and do something quiet until you feel sleepy, then go back to bed.
- Keep tomorrow’s wake time. A lie-in after a bad night makes the next night harder.
How to fix it for good
- Wake at the same time every day, weekends included. The NHS advises getting up at the same time every day, even after a bad night.
- Get daylight soon after waking, ideally outside, and keep evenings dimmer.
- Move during the day, but avoid hard exercise in the 4 hours before bed, as the NHS advises.
- Set a caffeine cut-off of early afternoon, and keep alcohol for earlier in the evening, if at all.
- Build a wind-down routine of 30 to 60 minutes. Our bedtime routine for adults gives you a ready-made one.
- Deal with stress in daylight hours, with a short “worry time” in the early evening, exercise and talking things through.
- Pay back sleep gradually. Going to bed a little earlier works better than long lie-ins. See sleep debt.
Give new habits a couple of weeks before you judge them. If it still isn’t better, the NHS says GPs can offer cognitive behavioural therapy for insomnia (CBT-I), face to face or as an online programme.
Some people like a warm, caffeine-free drink as a signal that the day is over. Our Magnesium Glycinate Sleep Complex combines magnesium bisglycinate and citrate with glycine, L-theanine and chamomile. Magnesium contributes to normal psychological function and the normal functioning of the nervous system. Others add a few drops of our Sleep CBD Oil, broad spectrum CBD with passion flower and a terpene blend, to their evening routine. CBD isn’t a treatment for insomnia, and habits come first.
The FSA’s 10mg a day figure is precautionary advice rather than a legal limit, set while longer-term safety research continues. At Evopure we think it is a very cautious figure, and many adults use more. If you go above it, increase slowly, and check with your GP or pharmacist first if you take any medication.
When to see a GP
Tired but wired is usually down to habits and stress, but see a GP if:
- It has lasted for months, changing your habits hasn’t helped, or it’s making it hard to cope day to day.
- You need far less sleep than usual but feel full of energy, with racing thoughts, talking fast or acting impulsively. The NHS lists these as possible signs of a high mood in bipolar disorder. See a GP, or get urgent help if you or someone else is at risk.
- You also feel shaky, anxious and hot, with weight loss, a fast heartbeat or sweating. These can be signs of an overactive thyroid, which a blood test can check.
- It started with a new medicine. Problems sleeping is a common side effect of some medicines, including the antidepressant fluoxetine (Prozac). Don’t stop a medicine on your own: speak to your GP or pharmacist.
To pick a bedtime that gives you enough sleep before the alarm, try our sleep calculator and bedtime chart.
If tired but wired isn’t quite your pattern, see 14 common reasons you can’t sleep.
FAQs
Why am I tired but wired at night?
Usually because your stress system is still switched on when sleep pressure is high. Common triggers are stress and worry, screens and bright light late in the evening, caffeine after lunch, alcohol, staying up late for “me time” and a body clock that runs late.
How do I sleep when I’m tired but wired?
Dim the lights, put screens away, write down what’s on your mind and slow your breathing in bed. If you can’t settle after about 20 minutes, get up and do something quiet until you feel sleepy.
How long does tired but wired last?
After a one-off trigger such as a late coffee or a stressful day, usually a night or two. If it’s down to habits or a late body clock, it usually eases once those change, so give a steady routine a couple of weeks.
Can a thyroid problem make you feel tired but wired?
Yes. The NHS lists nervous energy, difficulty sleeping and feeling tired all the time as symptoms of an overactive thyroid. A GP can check with a blood test.
Is tired but wired a sign of ADHD or bipolar disorder?
Trouble switching off at night is common with ADHD. Needing much less sleep than usual while feeling full of energy, with racing thoughts, can be a sign of a high mood in bipolar disorder. See a GP if either sounds familiar.
Sources
- NHS. Insomnia.
- NHS Every Mind Matters. Sleep problems.
- NHS. Bipolar disorder.
- NHS. Overactive thyroid: symptoms.
- NHS. Fluoxetine (Prozac).
- Riemann D et al. The hyperarousal model of insomnia: a review of the concept and its evidence. Sleep Med Rev, 2010.
- Vgontzas AN et al. Chronic insomnia is associated with nyctohemeral activation of the hypothalamic-pituitary-adrenal axis. J Clin Endocrinol Metab, 2001.
- Adam EK et al. Diurnal cortisol slopes and mental and physical health outcomes: a systematic review and meta-analysis. Psychoneuroendocrinology, 2017.
- Chang AM et al. Evening use of light-emitting eReaders negatively affects sleep, circadian timing, and next-morning alertness. PNAS, 2015.
- Drake C et al. Caffeine effects on sleep taken 0, 3, or 6 hours before going to bed. J Clin Sleep Med, 2013.
- Ebrahim IO et al. Alcohol and sleep I: effects on normal sleep. Alcohol Clin Exp Res, 2013.
This guide is general information, not medical advice. Evopure makes the Magnesium Glycinate Sleep Complex and Sleep CBD Oil. Our products are for adults only, and we don’t recommend them during pregnancy or breastfeeding.
