Hi.
Thanks for your query.
Noted the history and understood your concerns.
Since you have
constipation off and on the bleeding in stool can be due to
fissure in ano, colitis, impacted fecoliths getting partial separation to cause bleeding, polyps and so on.
This can be diagnosed by the following ways only.
Send the stool sample for tests including that of occult blood.
Upper GI Endoscopy to review the
gastric ulcers and acidity related problems as you have mentioned these.
Colonoscopy including proper ano=proscopy to see for the reasons for
blood in stool, biopsy may be needed.
Take a laxative daily to avoid constipation and make changes in diet that can help avoid constipation.
Take high fiber diet and take plenty of oral fluids.
Once diagnosed the proper cause, the management will be according to the cause thus found.