Compression bra necessary after explant if no lose skin and swelling? I am struggling to breathe with it on as I have asthma.

The purpose of compression after surgery is to give support to the tissues while they heal and prevent seroma formation. If you are having difficulty breathing when wearing your compression then it is too tight. I encourage you to visit with your surgeon to find the proper compression for you that is comfortable.

 Although I understand your desire to receive online advice, this type of question is best run by your plastic surgeon who knows your situation best and is ultimately responsible for your care. Best wishes for an outcome that you will be pleased with long-term.

Tight wraps that keep you from breathing are very likely too tight and you should call your surgeon's answering service and get connected with your doc.  There are other reasons for shortness of breath after surgery and this needs to be evaluated.  It takes a very tight bra to limit breathing and this is unlikely.  Good luck!