Certain physical or environmental factors, such as foods, hormonal changes, weather, and stress, can lead to or “trigger” a migraine. However, it’s important to remember that triggers are different for everyone. That’s why, to help prevent migraine attacks, you need to figure out which triggers affect you and which ones don’t. Keeping a headache diary is an effective way to track triggers, and it will help you talk to your healthcare professional about your condition.