Your mother had prolapsed bleeding piles.
You need to go for warm water sitting after every time she pass her stool for at least 10-15 minute this will clean the area.Then apply xylocain containing cream.
An Anti inflammatory medicine along with Amoebicidal help to control inflammation with anerobic infection.
The most important thing is she must gets loose stool
to prevent friction so she should be given mild laxative along with more leafy vegetables.