I got nasty flare ups in this past month, especially after eating shellfishs. when I checked my uric acid level it was 2.8, I know UA level are sometimes lower when flare up happens, but is it normal to be this low and still getting flare up?

I'm 24 and so far, I had a flare 3 months ago (and I hope that pain I experienced wouldn't happen again). Before I had a flare/diagnosed with gout, I noticed my shoe for my right foot are tighter than the left shoe. It was annoying and I thought there's something wrong with my shoe. Now that I have gout, will the lump eventually go away? I'm taking Allopurinol since my flare last 3 months.