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There are tell-tale signs when you dont get enough REM sleep.

What is REM sleep?

A woman sleeping on her side wearing an eye mask

As part of a full nights rest, we cycle throughfour stages of sleepseveral times.

Thissleep cycleincludes three stages of non-REM sleep and one stage of REM (dream) sleep.

Initially, periods of REM sleep last around ten minutes and gradually increase up to an hour.

A woman lying on her side sleeping with a handdrawn thought bubble over her head to show she’s thinking

Heres how to get more.

Your brain needs to know when you get into bed that it is time for sleep.

If youre struggling to reset your sleep cycle, read our ways to quicklyfix your sleep schedule.

A woman in bed reading a book with a cup of tea in hand and a lamp on the bedside table, as she completes her nighttime routine

Dr Lee advises avoiding caffeine for at least six to eight hours before bedtime.

Alcohol might help you to initially drop off but it can also suppress REM sleep.

Opting for a restorative yoga routine before bed could be a great way to unwind.

A woman with afro hair wearing blue shirt waking up in three quarter bed with grey sheets, stretching our arms

As could listening to gentle, instrumental music or taking a warm bath or shower just before bedtime.

If youre someone who likes to exercise in the morning, youre already onto something thats benefitting your sleep.

Firstly, ensure your bedroom is cool and dark.

The image shows a curly haired man sleeping on his side while clutching a stuffed animal

Secondly, switch to soft, low lighting in the evenings and in your bedroom.

And thirdly, verify your bed including your mattress is comfortable and supportive.

Why is REM sleep important?

A woman with long brown hair sits up in bed covered in a pink comforter and yawns because she is so sleep deprived

Rapid eye movement sleep is important as it stimulates an area of your brain known as the amygdala.

Its associated with learning, emotional processing, dream content and memory consolidation.

What happens if you dont get enough REM sleep?

A woman lies in bed with her hands covering her face, looking upset due to sleep deprivation. A Tom�s Guide Sleep Week 2025 graphic, bottom left

If you dont get enough REM sleep, you could quickly experience some initial tell-tale signs.

These include feeling groggy in the morning, and feeling irritable and hungrier than usual.

You might also find it more difficult to concentrate and cope with your emotions.

The image shows a sleep deprived woman lying in bed and holding her hands over her eyes

Some people also find they are more forgetful when they havent had enough REM sleep.

Its also believed that it can disrupt the brains ability to repair and reset.

A chocolate Easter egg in pink tin foil next to image of blonde woman in purple star patterned pyjamas struggling to sleep in bed with white sheets

Woman lying down on the bed and smiling feeling comfortable

A woman with dark brown hair lies on her side staring at the back of a white alarm clock that shows the time as 2.30am

A woman with short brown hair sitting on bed with white sheets with a glass of green Spirulina smoothie in hand

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