Why sudden tightness/slight pain in pectorals muscle 7 weeks post BA. Even when I turn my neck, I can feel it pull. (photo)

Thank you for your question and photograph.  The tightness you are describing is quite common when a sizeable implant is placed under the muscle.  Increased pain or swelling should be reported to your plastic surgeon for evaluation.  Best of luck.

Dr. Davidson is correct.  This sudden pain is most likely due to overuse of a surgically injured muscle.  However your right (not drained) breast is obviously larger.  The question is why?  If your breasts were close to the same before surgery and the implants are of the same volume, this should not be the case.  So I would recommend that you see your plastic surgeon to determine why there is this asymmetry.  Good luck.