Should I be concerned with this pulled muscle that tends to bulge the size of a baseball? In addition, fluid retention (Photo)

Thank you for your question and series of photographs and I am sorry that your results have not been what you anticipated. It is difficult without an in-person examination to determine what may be taking place. Most commonly this is residual swelling from surgery which will spontaneously resolve but it would be important to voice your concerns to your surgeon to ensure that other issues are not taking place - discrete fluid collection, muscle laxity, or residual adipose tissue. Since you have already had seromas taking place, this upper abdominal bulge may be another one.  Your surgeon may have an ultrasound in his office that would aid in diagnosis.  Hope this helps.

not sure about the muscle you are talking about. it sounds like you have a seroma. this may go away by itself. other options are to place another drain or use a sclerosant. if one of my patients mentions getting a second opinion ,I always say go ahead

If you are unsure of the answer given to you you certainly can get a second opinion. This bulge can be caused by more than one underlying causes. Photos are not the way to get final answers.