With Single’s Day recently behind us and Black Friday & Cyber Monday still forthcoming, it’s important to be mindful of some of the health risks we may set aside while we immerse ourselves in flashy deals. The holiday season is often a time of overindulgence—as we buy more than we need, or often intend to, on those we love. This is particularly true as the psychology of sales kick into high gear—as they are already. We fear we’ll miss out, or that we could be saving “so much more money” if we only get out and fight the crowds.

Many people have heard of seasonal affective disorder, also known as SAD. It’s commonly thought of as a disorder where people are happy in the summer and sad in the winter. And while this is true in some cases, there is a lot more you need to understand about SAD. Read these seven seasonal affective disorder myths and truths to learn more – don’t miss the self-help tips at the bottom, either.