THIS Is Why You Started Gaining Weight Out of Nowhere

There's no discovery quite as startling as stepping on the scale and weighing way more than you thought you did (or realising that your trousers literally won't button), with absolutely no idea why. There's weight you expect to gain, resulting from, say, an overly indulgent vacation where you downed dessert with every meal (and moved only to order more room service, natch). But then there's the unexplained weight that seems to show up overnight, out of nowhere, and for no reason. When you can't find a culprit, it might be one of these seven reasons. Keep scrolling to see what they are!