Hi. As u said ur Fistula--in --Ano was treated by Ksharsutra Surgery.  Its a good kind of successful surgery if performed by an expert surgeon.   Fistula track has two openings, internal n external. These two openings are accessed n ksharsutra is tied from external to internal opening to include the track completely. Rt antibiotics or herbal medicines r given to clear out infection. If the two opening are not accessed properly then there r chances of failure.             U doubt that pus has oozed out from the anus, but u may b mistaken it for mucus that secretes normally.  But if u really see the pus again, then there r chances that infection is not under control n unfortunately chances of failure are there.           U should have thorough checkup of ur surgery done.

Dear,  don't worry  Best to the fallow your treating doctor as that doctor know your history,  so that doctor wl  give the right way ...

As you told that you have a fistula and treated by kst, fistula have two opening one is external and 2nd is internal side,when we don't found internal opening properly and kst done then it's recurrence and pus comes again.

You may consult your surgeon for further Advise.

Got your pain n concern, though it's unfortunate but it could be external blind n  remaining part or new one so plz consult n re-evaluate status

It may be fistula in ano. Visit Kerala ayurvedic centre Bhopal for betterment

If on one day, and there is no pus continuously  then need not worry. As a precaution you can take the medicines given below