Thank you for the query.
As surgery is a kind of stress for whole body, and so is stomach infection
, it could trigger peptic ulcers (it is known as stress ulcers). It gives upper middle abdominal pain
usually after 1-2 hours of the meal, nausea, heartburning.
Every surgery brings some risk of abdominal cavity inflammation and can cause abdominal cavity abscess. Endometriosis
always can give bowel obstruction due to adhesions.
You should have abdominal ultrasound, abdominal X-ray
and endoscopy performed. Full blood work and CRP should be also checked.
Hope this will help.