What Should I Do About Pricking, Burning, And Discomfort At The Anal Area After Using Nitroglycerin Ointment And Antibiotics?

Hi, I sometime get a pricking sensation at the end of anal area, which maybe occur mostly if I walk to much or if I sit for a long time or after passing stool. After sleep, it usually goes away. Sometime I get light burning like sensation after passing stool. There is no blood. Sometime I feel discomfort after passing stool as well. I had a nitroglycerin ointment for like 1 month, and a antibiotics (meroclav maybe) for several days. The feeling, pricking and burning all got better but its not fully recovered. There is still some of these issues remained. Now my question is, what should I do now? I try to maintain to pass stool two times a day, and take isobgul sometimes. Thanks.