What to do if i have blood in stools..i have booked an appointment with the doctor. how will the doctor diagnose th problem?

Stool analysis : By taking a sample of the stool,check yhe blood if it is fresh blood or not,if blood found,he will do endoscopy to see if a tumor is causing bleeding or bacterial infection is eating the walls of intestine causing bleed

History/Examination : A GI doctor would obtain a history of the bleeding. He/she will ask pertinent questions and determine frequency and if there is any associated pain with bowel movements or straining due to hard stools /constipation. Family history of colon cancer will be asked so impt to know it. A rectal exam and colonoscopy may be indicated based on your family history and response to questions.