A migraine hangover can be triggered by several factors, which can vary from person to person. The most common triggers include stress, lack of sleep, dehydration, and hormonal changes. Certain foods and drinks such as alcohol, caffeine, and processed foods may also trigger a migraine hangover. Bright lights, loud noises, and strong smells are also common triggers. Weather changes, such as barometric pressure changes, can also trigger a migraine hangover in some people. It's important for individuals who experience migraines and migraine hangovers to identify their triggers and avoid them as much as possible to prevent future episodes. Keeping a migraine diary can help identify triggers and patterns.