My 5 yr old daughter fell and put her tooth through her lip (a little under her lip). She had 4 dissolvable stiches inside and 4 regular stiches outside. The stiches came out a couple weeks ago and there is a lump that has developed where the wound was. If you push on the inside, the lump gets bigger on the outside and is a white color. Should I take her back in to a dr in case it s an infection?