While avoiding triggers is important, you also need to understand the limits of what you can do on your own to stop flares. Sometimes you can do everything right -- like taking your medicine regularly, avoiding triggers, eating healthy, and exercising -- and still get flares.
So when you have a flare, don't blame yourself or go crazy trying to track down triggers that may not exist. Instead, get some extra rest, take care of yourself, and check in with your doctor. You may need to increase or change your medication until the flare ends and you're feeling like yourself again.