I'm a bit to be asking this but DD has not had similar issues obviously so it's new for me.
DS is 15 months old and has in the last month discovered the pleasures of the palm when his nappy is off. Nothing unusual about that I assume but he pulls it really far (up to his naval) and then lets it go - it looks really painful. But he seems to like it. Is this okay? He won't actually damage himself will he?