An update. I had another examination today, I wanted second opinion from reputable CRS. First I showed him on a picture of the anal canal exactly where the source of my pain is located - (high up and at 4-5 o clock, but my tiny fissure is more at the bottom of the anal canal) and I told him about the puss leakage I had about four times in previous months. Then we agreed that he will press with his finger on the fissure and I will tell how much it hurts and if this is the main pain, because we both suspected that the fissure is not my problem after all. We quickly found out that the fissure, which is very tiny and semi healed does not hurt. He than put a pressure on various points outside and inside the anal canal. It hurts a lot in the upper half, but when he pressed on the point that I described him, that really hurts. He told me that the pain is located in the area of the puborectal sling (he should know, he is anatomy lecturer too). He suspects either Interspinchteric abscess (because of the ocasional puss) or pudendal canal syndrome. He says it is a bit confusing - with long term abscess I should have some fever and a big relief with puss coming out, but it was not so.
I should have a MRI scan first.
I need this MRI to be done quickly, so I will have to pay it - I can not stand this situation for another three or more months. But if it is abscess it should be filled to show on MRI scan and if it is drained it may not be visible.
Let s hope it is not something really dangerous.
Disabling burning, drilling pain in anal area for almost a year, started after UT infection. Small anal fissure diagnosed, turned out it is probably not the cause of pain, MRI shows no inflammation or fistula. Grateful to forum members for support.