Should i go to the emergency room when i see a lot of bright red blood in my stool?

Redrum!Redrum!Redrum: You should consider it if it is persistent, increasing, you're getting dizzy, or your wife gets the look of surprised horror when she looks at you and says "Honey, don't you think we should see the doctor?" If you are a bachelor, I'd suggest you monitor the toilet bowl and your underpants very closely and if there's any doubt, high-tail it to the ER before you or someone has to call an ambulance

Need to know more: How much is "a lot"? If you feel faint, due to blood loss, do go to the emergency room immediately. If you do not feel ill in any way, you may wait to see your regular doctor. If you do not have a doctor, then, please do go to the emergency room.

Urgent Care or ER: Blood in the stool is not a normal symptom. Fortunately, most of the causes of such rectal bleeding are not life-threatening (e.g. hemorrhoids), but the only way to be certain of the cause is to be checked by the doctor.

Hemorrhoid common.: Without a hemorrhoid, yes. Usually bright red blood is from the rectum or anus. It is probably a hemorrhoid and needs anoscopy to see it. Amount of bleeding in toilet is diff to judge. If the bleeding stops and you do not take aspirin or ibuprofen or other NSAIDs like naproxen, and you don't feel dizzy or lightheaded, you could wait until the morning to see a GI specialist or your dr