I can see how frustrating your situation is since you workout and try to live a healthy lifestyle.For most active patients, the initial weight gain after surgery is temporary. There are some things that happen around the time of surgery that result in weight gain.It is usual to gain some weight the first few weeks after surgery due to water retention from the release of natural hormones during surgery. After abut 2-3 weeks, your body will release that fluid. Some patients also gain weight because they are not allowed to resume full activity for 6 weeks. But most active patients can lose this weight quickly once they resume normal activity.After 4 months, I cannot think of any reason a breast lift with implants could be preventing you from losing the extra 10 lbs. Remember, the implants themselves could be adding 1-2 lbs.My advice is to work this problem on two fronts. At home, keep a diary of the calories you consume vs. the amount of activity you do during a day. A fitness tracker, like fitbit, might help you determine the amount of calories you burn in a day. Do this to verify that you are burning more calories than you are consuming. If you don't see a difference, discuss this with your plastic surgeon. He may suggest blood tests for your thyroid and a good physical exam with your OBGYN or Medical Internist. If everything checks out with your health, he might refer you to a medical weight loss clinic.Good Luck!