Wow I was just about to post almost exactly the same thing. My main tear is still uncomfortable when I have a BM but apart from that its liveable.
I also have a second smaller tear right at the top in my "builders bum crack", which acording to my GP is realy small, not infected and loks fine. In practice it feels like somebody is sticking pins in or sometimes like I have been burnt. Instances last for about 20-30mins or longer if I can't sit down and can be so sharp that sometimes I inadvertently yelp or wince, which is not a good thing for a teacher.
At home I have been experimenting with "naval language" after watching an episode of Mythbusters where they show that cursing actually reduces pain. It seems to help but upsets my neighbours.