I'm a 23 year old male 5.6ft and 11.2 stone and the bottom left of my ribcage sticks out as well. I want one removed:(
Why Does My Left Rib Stick Out More Than My Right?
This happens to me. It looks horrible. It looks like I have some sort of growth in there.
I noticed the same thing a couple years ago but after looking online I found it's pretty common. As far as getting a rib removed, can't help you on that one : )