I'm wearing braces to bring my lower jaw backwards. The day after my visit to the orthodontist, my nose got big. What to do?

My lower jaw was in from from childhood.I was able to smile with my tooth shown .The orthodontist told me that I had to wear braces to bring my upper jaw front or else my lower jaw will come front when I grow .I wore braces at age of 12 .Suddenly 5 months back I went to the orthodontist and the day after my nose became big.I thought I dashed my nose and it got swollen .But it is big even now .

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