The most common vaginal infection with a bad smelly discharge is bacterial vaginosis which is caused by anaerobe bacteria. Therefore the treatment should be with metronidazol 400mg whice a day for 5 days or clindamycin. Of course she need to be checked for trichomonas infection and for other STD's
I put in Meiji full fat 1 litter 3 table spoon Yolida yougurt, cover it and leave outside for 24 hours, after let separate the way through cheese clot over night in fridge. The best yougurt, can mix with few blueberies and pomegranates.