Thanks for your query.
Passing fresh bright red blood in the stool indicates that the source of bleeding is in the lower GI tract probably in the colon and rectum
. There are many causes of such lower GI bleeding like crohn's disease, ulcerative colitis
, cancer of colon and rectum, polyps in those areas. So to exclude all these possibilities you need to go through colonoscopy
and proctoscopy but before that you need to consult a gastrosurgeon and get yourself locally examined and go for the investigations i mentioned to detect the cause of the bleeding.