is there a swelling in the anal area, does she strain whe passing stool is she constipated these are the questions you need to ask her,
many causes of passing blood through anus, some that are from the anus region and there are those that are internal
the causes around the anal region include - hemorrhoids, anal fissure
, anal sore, anal abscess
which is burst, anal mass
the ones that are internal - colitis
, ulcers on the intestines, diverticultis, ulcers of the stomach.
you need to take her to be seen by a specialist in order to know what is cause because otherwise she is lossing blood causing her to be anemic.
hope to have answered your query.
takecare and get well soon