It is very difficult to carry on with other things, when something is sticking to your mind in a corner. It might be a pain, a pending task or a doubt. Without solving or burying it there is no peace.
I buried one such just now. Hopefully it won't return, but I enjoyed the challenge. Overall, this week had been quite boring because I had being doing lots of tasks without applying much mind to it. Now I got to sit down and hit few of the mind boggling stuff really hard. It gives lots of pleasure in being on top of the problem compared to being trodden over by it.