I had a BBL three weeks ago and I have bad scarring/ burns on my lower back from the lipo. Any suggestions? (photo)

Numbness and tingling after liposuction is normal. It can take months to get back to baseline. Most patients go through stages of pain, numbness, burning, itching etc. From your photos it looks like you have bruising which is also normal after liposuction especially aggressive liposuction that is done as part of a BBL. The bruising will go away with time. Three weeks is still very early in the healing process. Scars are normal after the skin is cut. Depending on your genetics, some people scar worse than others. Scars take about one year to fully remodel, so be patient. There are things that you can do to make them look better. Talk to your PS about scar management.