Thank you for your question.
I am a spine surgeon
and I can answer the first part of your question. The convex curve that you have described is called kyphosis when it is in front to back plane whereas side to side curve is scoliosis
. The kyphosis if it is postural which is common in adolescent girls and presents with stooped shoulders and slouched trunk. This can be corrected with physical therapy
and strengthening of back muscles with posture training. If the kyphosis is structural which means the alignment of vertebrae is fixed in kyphosis it needs to be corrected by surgery which is indicated if associated with weakness in legs or trouble walking and not for the cosmetic reason. Structural and postural kyphosis
is differentiated on Xray of the spine. So answer to your question is- it is likely to be postural kyphosis. See a good physical therapist.