Blood in stool is detected either by normal bleeding observed while passing the stool or on a tissue paper. By doing a stool routine test, which confirms either frank or occult blood. Other tests such as gastroesophagealscopy or colonoscopy is used to determine the root cause of bleeding. CBC is performed to check for anaemia due to blood loss.

The presence of severe bright red blood with stool indicates an acute condition, usually, in colon. Since a great amount of blood is lost, it becomes an emergency condition and the colonoscopy procedure is performed to determine the cause and treatment of the same.

Bleeding in the lower colon or rectum is known as the condition of rectal bleeding, which happens to be a common symptom of colorectal cancer. However, there are other conditions such as piles, fissures, polyps, which need to be ruled out as they are also known to cause rectal bleeding.

Yes, in certain conditions like diverticulitis, ulcerative colitis, chronic diseases, any of these inflammations can lead to infection in the GI tract, thereby causing pain and blood in stool.

The duration of treatment depends on the primary cause of blood in stool. Therefore, it could vary from person to person and from illness to illness.