Sleep experts have revealed a whole list of reasons why you might find yourself waking up constantly at 4am

Do you often find yourself wide awake at 4am, staring into the abyss? It might seem like a mere habit, but there could be an underlying issue, reports Surrey Live .

"We start to experience less deep sleep after around four to five hours," explained Lisa Artis, deputy CEO of The Sleep Charity , which partnered with Simba mattresses. As we enter lighter stages of sleep, we're more prone to waking up. If your usual bedtime is around 11pm – a common time for many – then waking up at 4am becomes more probable. There are several factors that contribute to these untimely awakenings.

Hormones play a pivotal role in our sleep patterns. "Sleep is guided by our internal clock or circad

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