prov:value
| - Some common ones include hormonal changes (in women), such as fluctuations in their estrogen level; foods (Common culprits include aged cheeses, alcohol, especially red wine and beer, chocolate, aspartame, marinated foods, pickled foods, fermented foods, and too much caffeine); stress at work, home or school; sensory stimuli such as bright lights, sun glare or unusual smells; changes in the person
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