A member asked:

What would cause me to wake at night with severe left side back pain? doesnt happen all the time but, when it does i can't sleep?!

A doctor has provided 1 answer

Possibly renal colic: Though one can't be sure from your description. Flank pain may be caused by a kidney stone. It may be paroxysmal and go away. It is also extremely painful. I would get a cat scan.

Answered 2/6/2016

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Thank

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Could sleeping on my left side all the time cause problems?

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