Question: Shoes that Bite!

My shoe is biting me!! HELP!
i always get blisters near my heels when i wear these kind of shoes(referring to ballet flats from this post)..but im dying to wear them coz they’re just cute and comfy!
tried lots of different ones, still get them..
any help please?
-Addy-
Most of the ballet flats that are available here has [...]