Bruising Feeling After Breast Implants

It really may have nothing to do with the implants. However, you should see your surgeon for an examination. I would not get too worried about something that occurred three years after your surgery and has only been there for a week. If it does not resolve over the next week or so or if it worsens, then I would suggest seeing your doctor sooner rather than later. Good luck.

You did not specify if your implants were "over" or "under" but I suspect they are under.
It is fairly common for women to overly exert themselves and experience brief periods of bruising or swelling. This is the most propable explanation. However, in medicine, we want to make sure it is not something worse.

Is there swelling or a mass?
Are you a candidate for a mammogram (over 35)?
Is this related to your menstrual cycle?
Have you chnaged hormone preparations?

In any event, I would try ice and anti-inflammatory agents. If the feeling does not resolve after 3 weeks, I would schedule an appointment with a physician to discuss your concerns and any other workup if necessary.

You may have self diagnosed yoru problem. Some soreness in the breast really can be from almost anything. If you can pinpoint a moment of exertion or perhaps trauma, this is the most likely cause.