What Causes Abdominal Pain And Passing Of Gas Post Hernia Surgery?

Sir my wife got operated in jun 12 for delivery and hernia both at time. after few days she was getting pain in the abdomen we thought it was from gas. Now again hernia reoccured. We went for hernia treatment while doing CT Chronic abcesses found near operated area and after removing it with injection its culture report AFB SMEAR SCANTY POSITIVE CAME KINDLY ADVICE A