What Causes Blood In Stool?
Some information
Detailed Answer:
Hello and welcome,
I read your question and your daughter should definitely contact her doctor. Regarding when - if it was a lot of blood, or if she is having light headedness, weakness, or a rapid heart rate, then she should go in to the ER to be seen. Otherwise she can contact her doctor tomorrow.
If there is bleeding from the stomach, it usually makes the stools look black and tarry because the stomach acid changes the blood to this appearance. However, if it is a brisk bleed from the stomach, then there might not be enough time for the acid to change the appearance of the blood and it can show up in the stool as bright red blood and there would be a lot of it.
If bleeding is from lower down in the gastrointestinal tract, then it will be bright red and mixed in with the stool. If a brisk bleed, it might show up in the toilet water too.
If bleeding is from a rectal fissure or hemorrhoids, then blood might be on the tissue rather than mixed in with the stool.
I am concerned not just about the alcohol, but also about the Excedrin as it contains aspirin which can be a stomach irritant. Her doctor may want to prescribe her a less irritating alternative with a lower risk of GI bleeding.
I hope this information helps. Please let me know if I can provide further information or clarification.