The search for the cause and cure of the common headache has kept doctors and healers busy for centuries. While research has linked head pain to a number of common triggers - stress and colds/flu are popular - there seems to an entirely new school of thought that connects headaches to a handful of unexpected sources.

The Guardian recently compiled a list of seven additional causes of headache:

When he gets a headache – whether it’s triggered by stress, a sinus infection, or an unidentifiable cause – my fiance immediately reaches for Advil. His reliance on the over-the-counter drug is so strong that