article_snippet: This leads to a painful headache, sometimes with aura – meaning the person experiences visual disturbances, dizziness and vertigo – as well as nausea and vomiting.
article_snippet: This leads to a painful headache, sometimes with aura – meaning the person experiences visual disturbances, dizziness and vertigo – as well as nausea and vomiting.
highlights_snippet: This widens blood vessels near to the nerves in the head, causing pain .
  