Those stretch marks appear silvery white and are likely old (previous to your breast surgery). When the tissues swell, stretch marks swell more than the surrounding skin and can appear very obvious. Once the swelling goes away, you won't be able to notice them as much. Bruising sometimes happens after surgery - the photos do not show a lot of bruising, but pictures can be misleading in color. (You should definitely follow-up with your plastic surgeon with any concerns, of course). From this limited post, you look good!
Dr. Michelle Spring