I think she have fungal infection due to unhygienic conditions; so should first remove the pubic hairs and daily washing with Trifala kwath water ,haldi powder 1/4 tsf and Shubhra bhasma 1/4 tsf.
V- gel (Himalaya drugs) for veginal application.
Orally medication:- Sarivadyasava 4 tsf after food mixed with warm water. Pancha tikta ghrita guggulu 2 tablets bd 7 am and 4 pm.
Note:- Avoid fast food ,excess chilli, salt,sour, curd etc irritable items. Soap should not daily use if alternating use only:- Actaril soap (Himalaya drugs).