Can a bruise leave permanent discoloration? (photo)

I am currently POD 4 from thigh liposuction with significant bruising. I had an ACL reconstruction 15 years ago and now am remembering that my bruising lasted almost a year. My physician then said that the blood tattooed my skin and could be permanent. Is this really possible? I have tried to ask my plastic surgeon here in Korea, but am having trouble with the language barrier. Any suggestions for helping it heal faster? I am using topical and oral arnica.