4 weeks after BBL and lipo and I already lost 5 pounds, why?

There may have been a lot of swelling that subsided that accounted for the weight loss. Please speak with your surgeon to discuss your concerns.Regards,

It is much too early to make assessments about final results four weeks after your BBL.  Recovery from BBL is patient dependent. Much of this depends upon the amount of liposuction performed and the amount of fat transferred. Usually by 3 months, the swelling is minimal and totally resolved by 6 months. About 50 to 70% of the fat survives long term. Kenneth Hughes, MD, Board Certified Plastic SurgeonLos Angeles, CA

Thank you for your question. With Brazilian butt lift we transfer fat from one area of the body to the other. These fat cells are transferred in microinjections throughout multiple planes in the buttock tissue so that they can gain new blood supply and live in their new home, providing increased volume and shape to the buttocks. You are likely seeing changes as a result of decreasing swelling.  After surgery there is a predictable swelling process that mostly resolves over two months, when the final result really settles in.  The fat that survives is there permanently.

So I would venture that the weight loss you are experiencing is mostly loss of fluid (likely from fluid that was used during the procedure). If that is the case, your weight should stabilize soon. Fortunately (or unfortunately depending on your perspective) the swelling that you likely have will also go down over the next several months. Results typically stabilize in about 6 months in my experience. As always it's best to speak with your surgeon.
I hope this helps!
Good luck! 

At 4 weeks out, your swelling is subsiding and with that you might drop a few pounds.. ...............