Why does teenage sleep drift later? Learn how the body clock, night-time screens and exam pressure interact, with step-by-step tips to rebuild a routine.
It is one o'clock at night. Light from a phone is still seeping out from under the bedroom door. In the morning, even after the alarm has gone off for the third time, getting out of bed feels almost impossible. This picture plays out every day in many homes and is often interpreted as "laziness" or "lack of discipline". Yet behind teenage sleep problems there are both biological changes and environmental factors such as late-night screens, exam pressure and social demands. Sleep directly affects many areas of a young person's life, from mood and school performance to emotion regulation and physical health. In this article we look at why the sleep pattern shifts in adolescence, how too little sleep affects young people, and step-by-step suggestions you can apply at home.
Why Does Sleep Change in Teenagers?
The change in sleep patterns during adolescence is largely biological. Our bodies have an internal clock that regulates the cycle of sleep and wakefulness over the day. This clock is set by light, darkness and daily routines. As darkness increases in the evening, the body starts to release melatonin, the hormone that prepares us for sleep.
In adolescence this internal clock naturally shifts later. In other words, a young person's body tends to feel sleepy later in the evening than it did in childhood, and to wake later in the morning. So when a fifteen-year-old cannot fall asleep at nine in the evening, it is usually not stubbornness; their body is simply not yet ready for sleep.
In addition, in teenagers "sleep pressure", the feeling of tiredness that builds up over the day and pushes us towards sleep, accumulates more slowly. A young person may feel more alert and energetic in the evening. When this biological shift combines with an early school start, evening cram-school or study programmes and night-time screen use, the young person's sleep is constantly cut short.
Experts generally recommend between eight and ten hours of sleep a day during adolescence. Yet many teenagers sleep well below this on weekdays and try to make up the shortfall by sleeping until noon at weekends. This confuses the internal clock further and makes Monday mornings especially hard.
What Are the Signs of Sleep Problems in Teenagers?
The signs of too little or irregular sleep in young people do not always look like "insomnia". You can watch for the following:
- Extreme difficulty waking in the morning, frequently arriving late at school
- Dozing off in lessons, difficulty with attention and concentration
- Sleeping until the afternoon at weekends
- Irritability, low tolerance and sudden mood changes during the day
- Being unable to fall asleep for a long time after getting into bed in the evening
- Waking often in the night, having nightmares
- Constant tiredness and lack of motivation during the day
- Growing interest in caffeinated and energy drinks
- A drop in school performance
These signs alone do not mean that there is a sleep disorder or another psychological problem. But if they continue for a long time and affect the young person's daily life, they should be assessed carefully.
Night-Time Screens and Teenage Sleep: What Is Going On?
Night-time screen use is one of the most important environmental factors affecting teenage sleep. The effect occurs in several different ways:
The effect of light
Light from phone, tablet and computer screens can give the brain the message that it is "still daytime" and delay the release of melatonin. An internal clock that has already shifted later biologically is then pushed later still.
Mental stimulation
Scrolling through social media, messaging, playing exciting games or watching a series keeps the brain stimulated. Waiting for a reply to a message, finishing a level in a game or the thought of "just one more video" makes it harder to move into sleep. Apps designed as endless feeds in particular make it hard to notice how time is passing, because they offer no stopping point.
Fear of missing out
For many young people, the night hours are the liveliest time for chatting with friends and keeping up with what is going on. The worry that "if I sleep while everyone is talking, I'll be left out" can stop teenagers from putting the phone down.
Interrupted sleep
When the phone is next to the bed, notifications can wake a young person even during sleep or make their sleep shallower.
We covered in detail how rules about night-time screen use and phones can be discussed in our article on controlling a teenager's phone.
The Effects of Too Little Sleep on Young People
Sleep is not just a time for rest. During sleep the brain consolidates what has been learned during the day, processes emotional experiences and continues bodily repair. For this reason, too little sleep affects many areas of a young person's life:
Emotion regulation: A tired brain struggles to regulate emotional reactions. A sleep-deprived teenager may overreact even to minor criticism. Insufficient sleep may lie behind some of the growing arguments at home.
Mood: Long-term lack of sleep is closely linked to anxiety and depressive feelings. The relationship runs both ways: anxiety and depression can disturb sleep, and disturbed sleep can in turn intensify those feelings.
Learning and exam success: Attention, memory and problem-solving skills depend directly on sleep. A young person preparing for the LGS or YKS (Turkey's national high-school and university entrance exams) who studies late into the night may find it harder to remember the next day what they have learned. Hours stolen from sleep often do not deliver the hoped-for return.
Physical health: Too little sleep can affect the immune system, appetite and energy levels. It may also affect performance and the risk of injury in young people who play sport.
Risk-taking behaviour: Sleep deprivation can weaken impulse control. This can lay the ground for young people making riskier decisions.
Everyday factors affecting teenagers' sleep in Turkey
For many young people in Turkey, the day begins early with the school shuttle bus and continues after school with study sessions, cram school or private lessons. A young person who returns home late feels that, after dinner, homework and mock exams, they can only find time for themselves towards midnight. This "time of my own" is usually spent on the phone, and sleep is put off even further.
Long commutes in big cities, crowded and noisy living spaces, and sharing a room with siblings in small homes can also affect sleep quality. In regions affected by the 2023 earthquakes, or in families who have experienced migration, worries about safety and fears triggered during sleep can also harm young people's sleep. Financial worries in the family and uncertainty about the future can also occupy a young person's mind more at night.
Say a teenager in the second year of high school stays for two hours of study after school, gets home, eats and finishes homework, and can only look at their phone at around eleven at night. Scrolling that started as "just a bit of downtime" stretches to two in the morning without their noticing. The alarm going off at half past six the next morning starts the cycle again. In this example the problem is not only the phone; it is that the young person finds no rest or time of their own during the day. So the solution is not only to ban the screen but to build breathing space into the day as a whole.
How to Build a Sleep Routine in Teenagers: Step-by-Step Advice
1. Talk about sleep as a health matter, not a matter of discipline
Commands such as "Go to bed now!" often end in an argument. Instead, talk calmly about the effects of sleep on mood, concentration and exam success. When a young person understands how sleep serves their own goals, they are more open to change.
2. Set a regular wake-up time
One of the most effective ways of building a sleep routine is to keep wake-up times on weekdays and weekends close to each other. Not shifting the weekend wake-up time by more than an hour or two from the weekday one helps the internal clock to settle.
3. Make use of morning light
Opening the curtains after waking, having breakfast somewhere bright or starting the day with a short walk supports the setting of the internal clock.
4. Set a "night limit" for screens
It is recommended to put screens away at least an hour before bed. To make this rule easier to follow, it can help to leave phones outside the bedroom overnight, for example on a charging point in the living room. Applying this rule to the whole family, not just the teenager, is fair and credible.
5. Find something to replace the screen
A young person who puts the phone down needs an alternative. Calming activities such as reading a book, listening to music or an audiobook, a warm shower, gentle stretching or writing a journal make the move into sleep easier.
6. Limit caffeine and energy drinks
Coffee, tea, cola and energy drinks consumed in the afternoon and evening can make it harder to fall asleep. It is common for young people to turn to energy drinks during exam periods; it is important to have an informative conversation about this.
7. Use the bed only for sleep
Studying in bed, watching series or spending hours on the phone can lead the brain to associate the bed with wakefulness. For a young person who cannot sleep, it can help to get up after about twenty minutes, do something calm in dim light, and return to bed when sleepy.
8. Plan the study schedule to protect sleep
Instead of working after midnight, it is more productive to spread study hours across the earlier part of the evening and take short breaks. Our article on study motivation can also be a guide on study habits and reluctance.
9. Move in small steps
It is not realistic to expect a young person who sleeps at two in the morning to move to ten o'clock overnight. Bringing bedtime forward by fifteen or twenty minutes every few days brings more lasting change.
Sleep is not time a teenager steals from studying; it is an investment that makes what they have learned stick, balances their emotions and prepares them for the next day.
When Should You Seek Professional Support?
Some changes in the sleep pattern are an ordinary part of adolescence. However, it is helpful to consult a specialist in the following situations:
- If sleep problems have continued for more than a few weeks
- If the young person cannot sleep through the night despite being tired
- If sleep problems are accompanied by persistent sadness, hopelessness, loss of enjoyment or intense anxiety
- If there are nightmares, night terrors or sleep disturbances that began after a traumatic event
- If school attendance and school performance are clearly affected
- If there are signs such as snoring, pauses in breathing during sleep or excessive sleepiness during the day
An assessment by a paediatrician or the relevant doctor to rule out physical causes, and, where considered necessary, the opinion of a psychiatrist, are important. If the young person talks about harming themselves or ending their life, call 112 (emergency services) without delay.
How Are Teenage Sleep Problems Handled in Therapy?
In therapy, sleep problems can be addressed both in their own right and as part of accompanying conditions such as anxiety, depression and stress. The adolescent counselling process often draws on the following approaches:
Cognitive Behavioural Therapy techniques for sleep: Habits and thoughts related to sleep are examined. A sleep diary is kept, the link between bed and sleep is strengthened, and sleep times are adjusted gradually. Anxious thoughts such as "I won't be able to sleep tonight either" are worked on.
Working with anxiety and a busy mind: For young people whose thoughts keep spinning when they get into bed, techniques such as setting a "worry time", writing thoughts down on paper and relaxation exercises are taught.
Addressing accompanying emotional problems: If the sleep problem is linked to depression, anxiety or a traumatic experience, work is also done on that underlying problem.
Collaboration with the family: Household routines, screen rules and the family's own sleep habits are reviewed with parents. How rules can be put into practice without creating conflict is discussed.
For general information about insomnia in adults, you can also read our article on how to overcome insomnia.
Frequently Asked Questions
How many hours should teenagers sleep?
In general, between eight and ten hours of sleep a day is recommended during adolescence. However, the need can vary from one young person to another. Feeling alert, focused and emotionally balanced during the day is a good indication that sleep is sufficient.
Does sleeping in at weekends make up for lost sleep?
It can be partly restorative, but sleeping until very late at weekends can shift the internal clock further and make Monday morning harder. It is healthier to keep the weekend wake-up time close to the weekday one.
My teenager can't sleep without the phone. What should I do?
Rather than removing the phone completely all at once, a gradual plan works better. Slowly reducing screen time before bed, replacing the phone with a calming activity and charging the phone outside the bedroom are good first steps.
Can sleep problems be a sign of depression?
Yes, they can. Being unable to fall asleep, waking often, or on the contrary sleeping far too much can occur together with depression. If the sleep problem is accompanied by sadness, hopelessness and loss of enjoyment, it is important to ask a specialist for an assessment.
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Eda Erkan Alapala
Klinik Psikolog. İstanbul Kent Üniversitesi Klinik Psikoloji Tezli Yüksek Lisans mezunu; bilişsel davranışçı terapi, çocuk merkezli oyun terapisi ve çocuk-ergen psikoterapisi alanlarında eğitimlerini tamamlamıştır.
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