Have you ever woken up in the middle of the night only to realise your hand feels completely numb, almost as if it has lost all sensation? Many people experience this unsettling moment during sleep.

For many, it’s an eerie pattern: the clock strikes 3:00 a.m., and like clockwork, they’re wide awake. No matter how tired they were the night before or how long they stayed in bed, their body seems to ...