Have a question about my son, hes 7months old and outside of having reflux-he is healthy. Mainly asking this, cause every time my mom holds him, shes always asking "Is his back ok?" Now, its kinda driving me nuts. Hes not fully sitting up yet. But anytime hes kind of bent over, a part of his lower back, right above where his tailbone is I guess, sticks out. I'm constanly running my hands over it and he doesn't cry. His spine is not curved or anything, just sticks out a bit. I'm assuming this is normal, until he starts to sit up straight and begins walking?