I was washing my car today and noticed this part sticking out near the driver seat door. Any idea as to how that happened? I never noticed it before and I haven't hit anything as far as I know. My car is only about 4 months old.
Underneath the car you should be able to see the bottommost mounting point for the fender to the frame. If there's a rock or anything jammed in there it could cause bowing out right at that spot. You should be able to bend it back in with a chisel (cover it with something non-marring), hammer and a heatgun.
My fenders do this as well, but it was on purpose since I needed to pull the entire fender outwards for wheel fitment.