An pit on perianal region. Responding?

LIS surgery was done 5 years ago for anal fissure. Then no problem in anus. But 20 days ago  without any hard stool I feel burning sensation only when washing after latrine but no bleeding during motion. In the meantime I have used smuth cream for last 8 days but problem was increasing. Then I consulted a general surgeon who saw my anus and told a pit was created at 11'O' clock position. Then He advised me 1- Escot cream 2- Nuflam - TH 8 mg and sitz bath  for 2 weeks. After abiding his advice just 5 days the depth of the pit at 11 "O" clock position has reduced as seen by my Friend and I also feeling less burning sensation  But when I asked the surgeon is it fissure ?? He told no it is a pit just at the mouth of the anus but not in anal canal. My query is if it is not fissure then why the above medicines are responding ???