<s>[INST] Im 14 years old with really bad lower back pain.  If i stay still in certain positions it wont hurt but when i move around or sit up it will hurt alot then i would go back to a better position and it will stop.  So it only hurtrs real bad when i move and stuff.  I used to crack my back a lot such as sitting in a chair and twisting my back they may have something to do with it.  and when i lay down to go to sleep i twist my body both ways so i can crack my back [/INST] Welcome to Chat Doctor .1. I think you don't have to worry much at this age unless you had any trauma.2. Simple thing you have to do now is, visit your GP on normal appointment basis and get an x-ray lumbar spine AP/LAT to see the gross pathology / bony abnormality.3. If there is nothing abnormal seen, just do the back pain exercise on daily basis with flat bed and proper positioning should help you.4. Get a normal appoint meant and get the needful things done. Hope it helps you. Wish you a good health. Anything to ask ? Do not hesitate. Thank you. </s>