Hello there I am dr.milan an infectious disease specialist answering your query. This type of picture is usually seen in two type of condition. 1.structural abnormality 2. Infection. If there is structural abnormality like proper suture healing is not done, or belly track is connected with some inner body tissue which causing adhetion. To rule out you need to see doctor who have operated. And ask to rule out any problem. If it is nothing structural we need to ruleout infection. If infection is there it is along with fever, redness, discharge and pain. Any of these may be there.few are present here. So you need to go for culture examination of discharge. After such a log time postoperatively mostly by some infection. Which may be hospital acquited or may be you have acquired infection after complete healing which is not from hospital. Because u have spent long time after operation this may be acquired from other source. So just follow your operative surgeons giudance while keep this things in mind. Hope i have given a good guidance to yoy. Givee star rating according to your satisfaction level. Thanking you.