Our expert says:
Swollen, it might be due to trauma cause by using to hard a tooth brush or even due to flossing. It might of course be due to an infection, but infections usually don’t come and go very 3-4 days. The best would be to take care when you brush and floss, and to use a good mouth wash. If it still persists, the best would be to see your doctor. Good luck.
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