My son is 4 years old and had swelling on the right side of his upper teeth. The swelling has reduced by about 80%, but a little bit is still present. We have been seeing the dentist for the past 10 days, and they have cleaned the area and done a temporary filling. The dentist prescribed Metrohex gel to apply on the swollen gum three times a day. I would like to know how many days it usually takes for the swelling to fully heal. Or this treatment is going on right path?