I welcome you to health care magic I am Dr Fahim, General Surgeon and I will be addressing your health concern I have gone through your question and understood your concerns. With available information to me it appears to be a ventral/incisional hernia because of the previous history of abdominal operations along with nauseating feeling when you push it back. It hints towards presence of bowels in it. Although hernia is a clinical diagnosis, but nevertheless, Ultrasound abdomen will conform this diagnosis. Incisional hernia can complicate into intestinal obstruction which is then emergency and patient will need urgent surgery. Incisional hernia’s treatment is operation called hernioplasty e prolene mesh repair under spinal anaesthesia. Wishing you all the best and rapid recovery. I hope my answer will help you. Do rate my answer if you like it. Regards