Whats her age? Is she anaemic?
If everything is normal,
1. Ask her to take iron and folic supplements.
2. Lots of fresh fruits, dates, fig.
3. Vegetable soups with peper at evening.
4. Physical activity daily.
5. Good night sleep.
Next Steps
Follow the advices provided, only this can be suggested with the history you have given. if you need further advice and clarifications, contact me on chat.