I am a thirteen year old female (if it helps). When I sit down and I slouch a little bit(bad habit, I know) for a while, it starts to tingle on the left side of my ribs. Also, when i touched my ribs, I felt that one rib sticks out a little bit. Where that rib is, is in the same area that tingles. I don't know what I have, and we don't have money to go see a doctor, and I'm really scared. I told my mom and she said that its because of what I eat/me coming home and sometimes not eating. Is the thing that I have serious?Please help me. I appreciate it.