I am treating anal fistula & pinonidal sinus since 14 years in PUNE ( India ).Here we insert a medicated thread ( called as Ksharsutra) in the sinus under local anaesthesia.
This thread is changed after every 7 days. In 4 to 6 weeks patient is free from disease. No need of admition, dressing, antibiotics. No recurrence. Patient can continue his work as there is no big wound. You can get more information on http://www.omayurvedicclinic.com