Thank you for your question.
If your bleeding is persisting, I would strongly recommend that you should be seen in the ER.
If not, then you should be seen by your regular doctor as soon as you can get an appointment.
The most common cause of such bleeding is either due to hemorrhoids or anal fissure.
However, obviously, things like cancer must be ruled out, even though it seems unlikely with such a sudden presentation is still a possibility.
You will require an anoscopy (where the doctor would have a look inside from down below to see if there is any hemorrhoid that is bleeding and to have a look inside the rectum to look for the source of bleeding).
So you definitely need to be seen.
If you need to be seen in the ER depends on how severe your bleeding is.
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