Thanks for posting your query.
There is least chances of getting bleeding due to hernial surgery of stomach.
Suppose if bleeding is occurring from upper gastro-intesinal tract then blood will also come in vomit.
You should consult with physician/ surgeon and should go for localized anal examination with per rectum examination.
If this examination is normal then you should also go for following test: complete blood count
, bleeding time
, clotting time, prothrombin time
, renal function test and colonoscopy.
You should also go for endoscopy for satisfaction.
If your hemoglobin is below 8 gm% then you should also go for blood transfusion
Dr. Mayank Bhargava