Small redness/bruising on sides of breasts 6 months post-op, normal? (Photos)

This all fall in line with normal postoperative changes. If you are worried visit the surgeon for a follow up.

Dear Sincere781772,
I understand your concern. However, without a proper assessment, it would be difficult to determine what is wrong. It is best that you visit your plastic surgeon for further assessment or ask for a second opinion. Only after a thorough examination, you can get proper recommendations and advice.
Daniel Barrett, MDCertified, American Board of Plastic SurgeryMember, American Society of Plastic SurgeryMember, American Society of Aesthetic Plastic Surgery

It's difficult to tell from the submitted photos but it appears what you are referring to are veins. Sometimes after augmentation veins that weren't visible prior to surgery are pushed closer to the surface and become more obvious. If you have further concerns visit with your surgeon.