The reasons for nighttime awakenings vary—from stress and anxiety, poor sleep habits, to health issues. Understanding the causes and consequences of this phenomenon is the first step toward finding effective solutions and restoring quality sleep.
Waking at various times during the night is quite common, often caused by noise or the need to use the toilet. However, if it happens regularly, it could indicate something more serious.
Doctor Amir Khan reveals the reason why you wake up at the same time every night. In an episode of his podcast No Appointment Necessary, the doctor explained that persistent awakenings may be due to high levels of cortisol, a hormone released when your body is under stress.
"Cortisol has what we call a diurnal variation, meaning it changes throughout the day, with levels higher in the morning and daytime, then starting to drop at night. However, if you are constantly under stress, you don't get that drop in cortisol, which you need to fall asleep. So falling asleep becomes really, really difficult," he stated.
He noted that this can lead to waking up at three or four in the morning every night.
"Cortisol levels start to rise around three or four in the morning, and then begin to wake you at dawn. If you have a baseline cortisol that is already high and it starts to naturally rise at three or four in the morning, you will wake up at three or four because it's no longer a natural increase. You've already started at a much higher level. That three a.m. awakening is so common, isn't it? It's so common," he said.