You went to bed on time. You slept through the night. However, you are still groggy after getting up because you feel as though you have not even closed a single eye.
Feeling tired after waking up is a very common occurrence, which can be really annoying because the reason behind it is not only the total hours that you sleep during the day. One day the problem will be very simple and you will solve it easily, while others will be clues that a more serious issue is underlying. The following are eight major causes of this problem, and what you can do about each of them.
1. You’re Not Getting Enough Sleep
This point seems so obvious, but it is the primary cause of insomnia. Adults are recommended to sleep between 7 to 9 hours on a daily basis. However, some individuals may require slightly more than this range.
Lots of people do not get the required amount of sleep. One can easily add up several hours of sleep loss by having a late night here and taking an early start elsewhere. Such a kind of sleep debt accumulates over time and one will eventually feel tired even if it was a good night’s sleep.
What to try: Work out your real bedtime by counting back from your wake-up time. Aim for at least seven hours in bed, and protect it like an appointment.
2. Your Sleep Schedule Is All Over the Place
Going to bed at 10pm on weeknights and 1am on weekends, then sleeping in until midday, confuses your body clock. It’s a bit like flying across time zones every weekend, and many people feel the effects as groggy Monday mornings.
Shift work can cause the same problem, since your body clock is constantly being asked to change.
What to try: Keep your wake-up time within an hour or so every day, including weekends. If you work shifts, see our guides on sleeping after a night shift and managing rotating rosters.
3. Sleep Inertia: The Groggy Fog After Waking
Sleep inertia is that thick, foggy sensation after you awaken. This is a natural aspect of sleeping, and almost everyone experiences it at some level. Sleep inertia is at its lowest ebb when the phone rings or goes off interrupting your deep sleep.
Duration is from 15 to 45 minutes. Pressing snooze repeatedly might aggravate things, since you fall back into light sleep only to be jolted again.
What to try:
- Get up at the first alarm
- Open the curtains or step outside for daylight
- Drink a glass of water
- Move around, with a quick stretch or a short walk
- Keep a consistent wake-up time
If the grogginess lasts for hours rather than minutes, that’s not normal and is worth mentioning to your GP.
4. Poor Sleep Quality
You can spend eight hours in bed and still get poor-quality sleep. Common culprits include:
- A noisy or bright bedroom. Street noise, a streetlight, or a glowing phone can all interrupt sleep.
- A room that’s too hot. Many people sleep best in a cool room.
- An uncomfortable bed or pillow.
- A snoring partner, a restless pet, or young children waking you.
- Screens before bed. Scrolling keeps your brain switched on.
What to try: Make your bedroom dark, quiet and cool. Put your phone away 30 to 60 minutes before bed, and wind down with something calm.
5. Alcohol and Late Caffeine
A glass of wine might help you fall asleep, but it often disrupts the second half of the night. It reduces REM sleep and tends to break up your sleep as your body processes it, so you wake feeling unrefreshed.
Caffeine can also linger longer than you’d think. It has a half-life of around five hours, which means a late afternoon coffee can still be affecting you at bedtime.
What to try: Avoid alcohol close to bedtime, and aim to have your last coffee or energy drink at least six hours before you go to bed.
6. A Sleep Disorder Such as Sleep Apnoea
Sometimes the problem isn’t how long you sleep, but what happens while you sleep. Obstructive sleep apnoea is one of the most common culprits. Your breathing repeatedly pauses or becomes shallow during sleep, which interrupts your rest, often without you ever fully waking up.
Signs to look out for include:
- Loud snoring
- A partner noticing pauses in your breathing, or gasping and choking
- Waking up with a headache or a dry mouth
- Feeling unrefreshed despite plenty of hours in bed
- Daytime sleepiness or dozing off unintentionally
Other sleep conditions can also play a role, including insomnia and restless legs syndrome.
What to try: If these signs sound familiar, talk to your GP. Sleep apnoea is common, and it’s treatable. Our guide “Always Tired? How to Tell If It’s Excessive Daytime Sleepiness” explains how a sleep check works.
7. Stress, Anxiety or Low Mood
Your mental state directly impacts the quality of sleep you get. For example, anxiety can keep the mind racing, making it difficult to drift into deep sleep or it can cause you to wake up very early, before your mind has had the chance for a good rest.
Depression is another condition that alters your sleep cycle to the point you are only able to get short sleeps, wake very early, or even if you sleep all day you still end up feeling very tired.
You can also be extremely tired after some time of work burnout without getting any benefit from resting since a lot can happen in the work environment that drains you physically and mentally.
What to try:
- Write down your worries earlier in the evening, not in bed
- Try slow breathing or a short relaxation routine
- Make time for exercise and daylight
- Talk to your GP or a mental health professional if low mood or anxiety is ongoing. This is a health issue, not a weakness
8. A Medical Condition or Medicine
Persistent morning tiredness can sometimes point to a health issue. Common examples include:
- Anaemia or low iron
- An underactive thyroid
- Diabetes or blood sugar problems
- Chronic pain
- Hormonal changes, such as those around menopause
- Long-term illness or recovery from an infection
Some medicines can also cause drowsiness or affect sleep, including certain antihistamines, sedatives, and blood pressure or antidepressant medicines.
What to try: Don’t stop any medicine on your own. Speak to your GP or pharmacist, who can review your medicines and arrange simple tests if needed, such as a blood test.
Quick Checklist: What to Try This Week
- Pick a consistent wake-up time and stick to it
- Aim for at least seven hours in bed
- Skip the snooze button
- Get daylight within an hour of waking
- Cut off caffeine at least six hours before bed
- Avoid alcohol close to bedtime
- Make your bedroom dark, cool and quiet
- Wind down away from screens
Give it two to three weeks. If you’ve tried these and you’re still waking up tired, it’s time to get checked.
When to See Your GP
Make an appointment if:
- You’re getting enough consistent sleep but still wake up unrefreshed
- You snore loudly or someone has seen you stop breathing in your sleep
- You feel very sleepy during the day or have nodded off while driving
- Your tiredness has lasted weeks or months
- You feel low, anxious, or struggle to cope
If you work nights or rotating shifts and the exhaustion won’t lift, shift work sleep disorder might be involved. Your doctor can talk you through your options.
The Bottom Line
Getting tired has nothing to do with you having to bear this silently. Usually, it’s just a matter of sleep timing, habits or the sleep surroundings and a minor switch can make a great change. In case they don’t, you might want to consider checking for potential conditions that might be behind your fatigue since it is possible to treat most of them, and that is where seeing a doctor comes in handy. Getting the truth sooner allows you time to go to the doctor before your fatigue becomes a habit. The earlier you get the right information,
This article is general information only and isn’t medical advice. If you’re concerned about ongoing tiredness, speak with your GP.