Why would I gain inches and then still have pain this long after lipo?

If you're stating that you immediately gained weight following liposuction and a bbl, your body is likely still swollen from the procedure.  It takes time for swelling the to gradually dissipate and your activity level (if moderate to rigorous) can cause your body to take longer to heal.  In regards to your back pain, it could be that what you are describing is actually your nerves waking up and regrowing. You can also experience more discomfort for a longer period of time if the liposuction was performed more aggressively. My best advice would be to follow up with your plastic surgeon, keep all of your follow up appointments and communicate your concerns directly to him/her. 

Thank you so much for share with us your question, and I'm very sorry to read about your pain and discomfort. 9 months after a Lipo surgery is the total recovery time you should contact your Surgeon who knows exactly the technique thatwas used in your surgery and he definitely can help you to determinate why you still have pain after this time. 
Without photos is very difficult to determinate the reason. If you don't like or you do not feel comfortable with your Surgeon opinion contact another Board Certified Plastic Surgeon.
Best of luck!
Dr. Quiroz 

If you are having pain nine months after liposuction and fat transfer you should consult with your plastic surgeon. Without photos it is difficult to offer any explanation as to why you would be larger after liposuction.Best wishes,Dr.Bruno