I had a hernia repair and full tummy-tuck 12 weeks ago. Before surgery I was extremely active and exercised/ran daily. My surgeon said I could resume all normal activities including ab exercises now. I did a more intense workout yesterday and am having swelling around the belly button. It does not hurt, but I can see it is inflamed. Is this normal and should I expect this every time I exercise? Is there anything I can do to avoid this?