I had hernia surgery 3 weeks ago in my abdomen and now I am experiencing pain and swelling to the right of the incision. There is so much pressure there and the area is rock hard. I called my surgeons office and they said it might be a fluid build up and to try a heating pad. The heating pad worked to reduce the swelling and pressure for the next two days, but does not seem to be working anymore. I did had to have a large blood clot removed the morning after surgery and am worried that this may be another one. Any ideas?