Hi welcome to Health care magic forum . Thanks for calling H.C.M.Forum. Your boy friend had a surgery for hernia.He got stomach pain, and black spot. He got pain nausea, and rest less nights. It appears the pain may be due to non healing of the internal sutures , and reherniation. Of course with out examination we should not comment, other causes may be gastric pain, urinary tract infection, stones in the urinary tract, and a big list. i advise you to consult the operated surgeon for diagnosis and treatment. You may need to have M.R.I. besides other routine tests for confirmation. I also advise you to avoid spices, junk foods, and oily foods. Wishing for a quick and complete recovery. Best regards.