I remember a rectovaginal fistula case that was discussed in a clinical meeting of Vaidyas here at Pune. Avagaha with medicated oil was reported to
be useful in this case. Sitz bath with decoctions of healing herbs such as triphala, daruharidra, should help. There are some internal medicines that
help to heal the fistula (e.g. Lodhra, daruharidra, etc.).
A pichu (tampon) soaked in jatyadi oil should help for local application to assist wound healing.