Hi, Welcome to Health care magic forum.
As you describe, it may be the
adhesion, or
surgical hernia.
I advise you to consult your surgeon for diagnosis and treatment. You may need to have M.R.I, for diagnosis.
For weight reduction you can follow the below steps.
Avoid the calories, fats, oils, junk foods, fleshy fruits like guava, and banana.
Practice, morning walk,
yoga, gardening, and house hold works like cleaning, keeping things in order etc.
Minimize the sleeping time, practice late to bed, and early to rise. Avoid the day time sleep.
wishing for a quick and complete recovery. Thank you.