My stool is not bright just red, maybe getting worse. pain like knifes in left side. but only for seconds.nausea.dizziness.heavy breathing. diarrhea.

Blood in stool: It sounds like you need to go to the emergency room for evaluation. Especially if you are having bloody stool and other symptoms. Good luck!

?blood in stools: Do you see red blood in your stools? If this occurs along with left sided abdominal discomfort and diarrhea, an inflammatory condition like ulcerative colitis or intestinal infection may be present..Your physician should evaluate this and may refer you for stool cultures and a consultation with a gastroenterologist.