It might just be hemoroids or tears from constipation. Tell her to use warm water and salt to wash the area to prevent infection.
If it continues after some days she should go to the hospital for proper examination. More serious cases could include colon cancer, ulcer, internal bleeding. Usually more serious conditions may or may not come with stomach pains.
But if it is not really painful, I doubt that it’s serious.
Note: This post is just for educational purposes. It is drawn from a true life story and not medical tests.