I have noticed that on my inner thighs (and quite high up) I've been developing stretch marks. I already have quite a lot of stretch marks on my outer thighs but they happened a few years ago when I started gaining weight.
This time though, I haven't lost or gained any weight and my thighs are still the same size as before the stretch marks started developing.
Does this happen? I thought stretch marks are because the skin can't keep up with the expanding area so it tears. So why would stretch marks happen if the area hasn't been expanding??

I already fucking hate how my thighs are already and I just don't get why this is being added.