Thanks for your question. A number of factors can contribute to back pain early after surgery. If you are maintaining a flexed at the waist posture to prevent undue tension on the incision line (as recommended by many surgeons) it can lead to strain on the back. This often resolves once posture is allowed to return to normal. Additionally, if breast augmentation can occasionally cause pack pain. This usually resolves within the first several days. And, of course, liposuction in that area can cause pain. Pain medicine can be helpful for these causes as can a heating pad- be careful with any heating pad while on pain medicine as burns can occur because of alteration in pain sensitivity.