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It wasn't like this before, but now I have severe pain that even prevents me from bending my back properly after resting well. Sometimes I try to sit up straight by straightening my back when I sit comfortably with a bent back. Usually, I relax with my back bent and then try to sit up straight, but I wonder if that's too much for my back. Recently, my back has been hurting so much, and even going to a pain clinic hasn't helped.