DD16 has had a large lump in her mouth, inside her lower lip, for about 3 years. Sometimes she bites it and liquid will come out and it will become smaller for a while, until it fills up with gunk again.
Her dentist referred her to the hospital last week. Nice doc said it was a mucocele and she needed an op under local anaesetic to remove it. She wants it gone, but I'm worried if something might go wrong - not sure what as nice doc said it was a simple op and nothing much could go wrong 
Anyone had one of these or work in this field?