Thanks for writing your query.
After reading your post, it seems that she might be having a bleeding in the gastrointestinal tract resulting in black stool
. It can be due to infection of the gastrointestinal tract.
I would advise that she should be clinically examined and investigated by a Gastroentologist. Endoscopy
and a stool examination may be helpful.
She should take an antacid like Omeprazole
40mg once a day before meals along with Domperidone
30mg. Antibiotic and antiamoebic will help, if infection is present.
will have an added beneficial effect.
Following precautions will be helpful :-
1.Avoid spicy and oily foods.
2.Avoid being empty stomach for long periods.
3.Avoid smoking and alcohol, if any.
4.Drink lots of water daily.
5.Eat light meals prepared under hygienic conditions.
6.Avoid self medications, especially pain killers and steroids.
I hope this is helpful to you.