As per your history u operated on 2015 till date to now u suffers that means u suffers extensively high.
Recurrent fistula is very common in modern surgery. And if fistula track is not properly debridement or if fistula track wrongly attempted means internal opening & external opening properly not identified then recurrence chances are very high.
If cleaning is not proper then and anal part is always contaminated due to fecal matter.
As per ayurveda - Fistula is 100% curable with no recurrence.
Kharsutra - Medicated seton which can gradually cut fistula track and every weekly u have to change seton. This ksharsutra thread working in two principle 1. Cutting d fistula track 2. Healing the normal granulation tissue.
Kharsutra prevent the recurrent and multiple fistula track. If u not treated early then fistula track convert into multiple that can convert into simple to complicated fistula.
Internal medication for healing purpose and reliving pain.
Ksharsutra is parasurgical techniques needs only 15 to 20 minutes.
U can work after that.
Only regular followup weekly for change seton.
Next Steps
Consult as possible as early good ayurvedic doctor specially MS (shalya).
Health Tips
Avoid nonveg, spicy food , jung food.
Advice - take light balanced diet,
If any query please consult mi on practo online