Sudden pain on the incision after 8 weeks post-op breast augmentation.

The sudden pain that you describe is common and temporary after breast augmentation.  I believe it is from stretching the sensory nerves in the breast, and typically gets better by itself.  See you PS to be sure.  

Thank you for your question.  Pain at the incision site is common and can occur when as you stated "you are using your arms too hard and lifting".  My advice is to not lift anything greater than 15 pounds for one month following breast augmentation.  Should you have increased pain, redness or swelling you should be seen by a physician.  Best of luck.

Every patient heals differently and every surgeon performs his breast augmentation using different surgical techniques that lead to different recovery periods. Depending on the surgical techniques your surgeon used it is likely normal that you are still experiencing sore and tender breasts. We recommend not doing any heavy lifting up to 6 weeks after your surgery. As long as the your level of discomfort is improving and not getting worse, you should be ok. You may also be experiencing something called Mondor's thromophlebitis if there is a visible painful cord under the scar when you lift your arm.  However, I would recommend calling your surgeon just to make sure everything is in fact healing properly.