Why Do My Breasts Look Like This When I Flex My Muscles? (photo)

Thank you for the question and pictures.

Your breasts change shape when you activate the pectoralis muscles because of the positioning of the breast implants and the sub muscular position. This “animation deformity” is a down side of submuscular breast implant positioning  that can be annoying to patients;  However, there are many upsides  to having breast implants placed in this position.

I would suggest that you be careful about repositioning breast implants in the sub glandular position and having  to deal with the downsides associated with this situation.

Best wishes.

Thanks for your question.  You are demonstrating an animation deformity that occurs to some degree with most subpectoral augmentations.   If the movement of the implants is troubling you, you can consider replacement of the implants above the muscle. 

This is a standard appearance of a flexion of the petoralis major muscle with an implant placed under it or "Animation Deformity". The photos really demonstrate the action. Only a re operation can improve, either by changing the location of the implant to sub glandular or releasing the insertion of the muscle (not recommended).