When an implant is placed under the chest wall muscle, the muscle needs to stretch out to accommodate the implant. The pocket is created during surgery, when the muscle is relaxed. After surgery the muscle will tighten due to pain and massage, high breast straps and muscle relaxants are given to "coax" the implant into the proper position. This usually takes 3 weeks to 3 months. Occasionally, when patients have a tight, well-developed muscle, this process takes longer. I would continue to massage the implant and avoid wearing bras that will give the implant too much support. If, at 9-12 months, the implant is still too high, you may need to have the capsule (scar tissue around the implant) released on the bottom to help the implant settle.