It may just be a random fluctuation—perhaps you just happen to be retaining water at the moment—but on the other hand, if you want to try doing something, you could start by checking over your food for hidden carbohydrate. Some bacons have added sugar, for example, and you have to read the ingredients carefully to spot it. Some artificial sweeteners are blended with sugar but are cagey about it. You get the idea. Also, a product that was safe before might have been reformulated, so it’s always worth double-checking.
Another thing to consider is whether you’re getting enough calories. If your carb level is okay, then try increasing your fat consumption and see if that helps.
Another thing to try is extended fasting, about which plenty has been posted on these forums.
Good luck!