Pulled Muscle in my back question?!

I pulled a muscle in my back on the right side, middle and it hurts, I put ice on it and it helps, but do you have any ideas of how I can heal it up quick, or take away the pain!.

All I did was twist around to pick up a box and this happened, I didn't even pick up the box, I don't understand how this could happen, how can I pull a muscle so easily!.Www@Answer-Health@Com

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