I am a teen and my mid/lower back started hurting and I think it might have something to do with my horrible posture. I don't know.

Backache . If your Back is hurting for a while you need to check it out with your 1ry care physician, if needed he might refere you to an orthopedic, at the mean time you can try ibuprofen or aleve, (naproxen) heating pads & watch your posture. Mid lower backache could come from problems in the abdomen or pelvis, so seeing your is important if that pain persisted. Feel better &good luck .