Cause not understood: Here's some info about it - but the big point is that they don't know for sure. http://www.healthline.com/health/migraine/causes-of-chronic-migraine#Causes2 Sorry - more research may find more solid answers. Hope this helps a bit!
Answered 9/14/2016
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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