
Emotional triggers
- stress
- stress relief
- anxiety
- shock
- depression
- excitement
- physical exertion
- hormonal changes (menstrual period)
- sleep (excess or lack)
- poor posture
- neck or shoulder tension
- teeth grinding
- lack of food
- dehydration
- alcohol
- the food additive tyramine
- caffeine (excess or withdrawal)
- specific foods or products: red wine, blue or aged cheese, chocolate, beer, bananas, citrus juice, smoked meat.
- air exposure (hot or cold)
- bright lights
- tobacco smoke
- loud sounds
- changes in climate
- strong smells
- altitude
- some types of sleeping tablets
- the contraceptive pill
- hormone replacement therapy (HRT), which is sometimes used to treat the menopause