Young woman awake in a dark roomIt’s normal to technically “wake up” as many as 20 times a night ― but you shouldn’t notice, or remember, most of those mini-rises. If you find yourself getting up more than once in the middle of the night, especially if you struggle to get back to sleep, you might have learned to hate that early-morning jolt.But if you’ve noticed they’ve become more common over the past few weeks and that your overall sleep quality has tanked in the colder months, you may not be alone. You might just be showing signs of something called “winter insomnia” (oh, good).What’s winter insomnia?It’s a bit like the sleep equivalent of seasonal affective disorder, which, by the way, also affects your sleep. It’s a seasonal disruption to your sleep routine that can be severe enough to regularly interfere with your day-to-day life.Speaking to Bustle,