I had a para umbilical hernia repair about six months ago. It seemed to go quite well. It wasn't a very big hernia and no mesh was needed. The surgeon warned me that I might get a lump after surgery and told me not to worry - this would be just fluid and will go away by itself (apparently this is called a seroma). This did happen in the weeks after surgery and then it seemed to go away. Six months on however, I seem to have another big squishy lump. I don't think its a recurring hernia but can't be certain. Could this just be more fluid? Also I have felt what feels like a hard grain of sand or grit roaming around inside at the site of my op. Any ideas anyone?