Hello Dr Ashish.
Discharges from perianal region without pain is the classical feature of Fistula in ano. You should examin it physically and per rectum. Probe to know it track. The best treatment of fistula in ano is Ksharasutra ligation.
From the complaints it looks like it is most likely a Fistula in Ano. Many times, it has been noted that a Chronic Perianal Abscess might be co-existing with the Fistula in Another. A per rectal examination is a must. A probe must be also passed to properly delineate the opening of the Fistula. Surgery is the best solution to this problem. Fistulectomy or Lay Open Fistula tract is done and then the wound heals by secondary intention
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