Around the same time you had your surgery I too had a (very minor) surgery to remove a tag. No fissure, just a tag that occurred as a result of a hemorrhoid I suffered when pregnant with my now 8 year old daughter. I posted about my experience here, as well as a question re the healing and a lump/tag I now have at the site of my incision:
lump-near-at-skin-tag-removal-site-t9639.html#p116060Like you I am curious as to when I can expect this thing to be gone, if ever. Mine is similar to what you describe and is sensitive/tender to the touch. For some time after my surgery it was more painful than the actual incision site, especially with a bm, but has significantly improved. I just want the thing to disappear entirely!!
Curious what others have to say.