Tired But Can't Sleep? Causes and What to Do
ired but can't sleep? Learn why stress, caffeine, screens and a shifted body clock keep you awake, what to do tonight, and when to see a sleep doctor
Your eyes have felt heavy all evening, yet the moment your head hits the pillow your mind switches on. If you're tired but can't sleep, the usual causes are stress and racing thoughts, caffeine, late screens, late naps and a shifted body clock. Sometimes a sleep disorder such as insomnia is behind it.
The good news is that most of these causes can be handled once you know which one applies to you.
Why am I tired but can't sleep?
It feels like a contradiction: the body asks for sleep and the mind refuses. The explanation is that sleep needs two things at once. The body has to need rest, and the brain has to calm down and leave its alert state.
When you are stressed or preoccupied, the body sets off a stress response that keeps the brain aroused. You feel drained, but your nervous system is still running as if it were daytime.
It helps to separate two feelings that are easy to confuse:
Sleepiness: a real urge to sleep. You drift off easily once your mind settles.
Fatigue: a sense of exhaustion and low energy. It can come with an inability to sleep, or with sleep that does not refresh you.
Many people who say they are tired but can't sleep are in fact fatigued, with a mind that is still wide awake.
Does this happen to you every night?
If you spend hours in bed feeling worn out without falling asleep, you may be dealing with insomnia that needs treatment, not just tips. A sleep medicine consultant can find the cause and set a clear plan.
Common reasons you're tired but can't sleep
There is rarely a single reason. Go through this list and you will probably find that more than one applies to you:
1- Stress and racing thoughts
This is the most frequent cause. As soon as you lie down, you start replaying the day or planning tomorrow. Stress keeps the body on alert and blocks the drop into sleep.
2- Caffeine and other stimulants
Coffee, tea and energy drinks can stay active in the body for hours, so an afternoon cup may still affect your night. Nicotine is a stimulant too.
3- Screens and late-night scrolling
Scrolling your phone or gaming late keeps the brain busy, so true sleepiness arrives later even when your eyes feel tired.
4- A shifted body clock
Late nights at weekends, or bedtimes that change from day to day, confuse your internal clock. Sleepiness then shows up at a time when the body is not ready for sleep.
5- Your bedroom
Light, noise, or a room that is too hot or too cold can be enough to keep you awake, even when you are clearly sleepy.
6- Late naps
A nap late in the day eats into your body's need for sleep at night. You feel tired, but your body is not truly ready to sleep.
7- Heavy meals and reflux
A heavy meal close to bedtime may cause discomfort or heartburn that stops you from relaxing.
8- Linking the bed with being awake
If you often work, scroll or lie thinking in bed, your brain may come to link the bed with wakefulness rather than sleep. You doze on the sofa, then feel wide awake the moment you move to bed.
Why young adults feel sleepy but can't fall asleep
In many teenagers and young adults the body clock naturally runs late. They feel sleepy in the evening, yet their bodies are not ready to sleep until the early hours.
This is called delayed sleep-wake phase disorder, where sleep is pushed back by two hours or more. The American Academy of Sleep Medicine estimates that it affects 7% to 16% of teenagers and young adults, and about 10% of people who complain of insomnia.
The result for someone tired but can't sleep at this age is a long night in bed, followed by a hard struggle to get up for school or work.
If you want to bring your bedtime forward gradually, we explain the steps in our guide on how to reset your sleep schedule and body clock.
Health conditions that leave you exhausted but can't sleep
If you have changed your habits and nothing has improved, a health condition may be the reason you are tired but can't sleep:
Depression and long-term anxiety
Insomnia and mental health are closely linked. About 40% of people with insomnia also have a mental health condition.
Restless legs syndrome
An unpleasant feeling in the legs that gets worse when you lie down and makes you want to move them, so sleep is delayed despite sleepiness.
Sleep apnea
It can cause repeated awakenings and unrefreshing sleep, leaving you sleepy by day and restless at night.
Pain and chronic illness
Joint pain, back pain and other long-term conditions make it hard to relax.
Hormones
An overactive thyroid and the changes of menopause are well-known causes of disturbed sleep.
Medicines
Some blood pressure, asthma and antidepressant medicines can affect sleep, as can stopping certain medicines suddenly. Do not change your medicine without talking to your doctor.
Could it be chronic insomnia?
Being tired but can't sleep can be temporary, easing once the stress passes or your routine returns. But it can also turn into chronic insomnia.
Insomnia is considered chronic when trouble sleeping happens at least three nights a week for three months or more, with no other cause to explain it. About a third of adults have symptoms of insomnia, and around 10% reach chronic insomnia.
For the types and causes of insomnia in more detail, see our article on the causes of insomnia and sleeplessness.
What to do tonight if you're tired but can't sleep
These are practical steps for the moment you find yourself lying awake:
If you have not fallen asleep within about 15 to 20 minutes, get out of bed.
Sit somewhere else in dim light and read something calm or listen to a soothing sound.
Stay away from your phone and the television.
Do not keep checking the clock, because it raises tension.
Go back to bed only when you feel truly sleepy.
The aim is to help your brain link the bed with sleep again, not with tossing and thinking.
Daytime habits that help you sleep at night
Much of what keeps you tired but can't sleep starts during the day, not at night:
Wake up at the same time every day, including weekends.
Avoid caffeine and nicotine in the six hours before bed.
Exercise regularly, but not in the four hours before bed.
Skip naps late in the day.
Keep the bed for sleep only, not for work or scrolling.
Make the room dark, quiet and comfortably cool.
CBT-I: the first-line treatment for insomnia
If insomnia continues, the first recommended treatment is not sleeping pills but cognitive behavioural therapy for insomnia (CBT-I). In most cases it helps more than medication, because it tackles the reasons you are tired but can't sleep at their root.
CBT-I changes the habits and thoughts that keep insomnia going. It is delivered over a number of sessions with a specialist, and most patients notice improvement within weeks.
Tried every tip and still not sleeping?
CBT-I sessions help you get your sleep back without relying on sleeping pills, with a therapist who specialises in insomnia.
💬 Ask about the sessions on WhatsApp
Are sleeping pills the answer?
They may help for a short time, but they do not fix why you are tired but can't sleep, and they are not a long-term solution. Over-the-counter sleep aids are not advised for more than a week or two. Doctors limit prescription sleeping pills to days or weeks because of side effects and the risk of dependence.
When should you see a doctor?
An assessment is advisable when changing your habits has not helped, or if any of these apply:
Severe daytime sleepiness, or dozing off while driving
Trouble sleeping that lasts for months despite better habits
Insomnia that makes daily tasks hard to manage
Loud snoring or breathing pauses noticed by a bed partner
Uncomfortable leg sensations that keep you awake
Ongoing low mood or loss of interest in things
Why Subat Clinics?
When psychological, behavioural and medical causes overlap, you need an assessment by a sleep specialist. At Subat Clinics we look for the real cause:
A consultant in sleep medicine to diagnose insomnia and body-clock disorders
Cognitive behavioural therapy sessions for insomnia with a dedicated specialist
Home sleep studies when sleep apnea or restless legs is suspected
Online consultations for patients outside Riyadh
How to prepare for your appointment
These details help the doctor work out why you are tired but can't sleep:
A two-week sleep log: when you got into bed, roughly when you fell asleep, and how often you woke
Your coffee and other stimulants, and when you have them
The medicines and supplements you take
Your nap times, if any
Any recent stress or changes in your life
Conclusion
Feeling tired but can't sleep has many causes. Some are simple habits you can change tonight, such as caffeine, screens and late naps. Others need a diagnosis, such as a delayed body clock, chronic insomnia or restless legs. Start with the practical steps, and if the problem lasts for weeks, CBT-I and a specialist assessment are the shortest route back to good sleep.
Book your appointment
If you spend your nights exhausted but unable to sleep, do not put off the assessment. Book now and start by finding the cause.
Address: Othman Ibn Affan Road, Al-Taawun District, Riyadh 12477
Phone: 0112011100
WhatsApp: 0505999713
The clinic is not an emergency facility. In an emergency call 997 or go to the nearest hospital.
Sources:
Cleveland Clinic — Cognitive Behavioral Therapy for Insomnia
American Academy of Sleep Medicine — Delayed Sleep-Wake Phase
This content is for health awareness and does not replace a personal medical consultation. Do not start or stop any sleep medicine without your doctor's advice.
Medically reviewed by: Dr. Ahmed Alruhaimi, Consultant in Pulmonary Medicine and Sleep Medicine, Subat Clinics
Last reviewed: October 2026
Frequently asked questions
Does warm milk or herbal tea help you sleep?
A calm bedtime ritual may help you relax, but relying on herbal remedies without advice is not recommended, especially if you take other medicines.
Is sleeping on the sofa instead of in bed a fix?
It may work for a while because it breaks the link between the bed and being awake, but it is better to reset your bedroom and keep the bed for sleep only.
Can I get used to less sleep?
You may get used to feeling tired, but the body does not truly adapt to ongoing sleep loss, and the effects on focus and health remain.
Does Ramadan fasting make this worse?
It may, because meal times, sleep times and late nights all shift. Keeping a fixed bedtime and wake time as far as possible helps reduce the effect.