Im trying to figure out if I need to take my daughter to her dentist or a physician for a sudden growth as described below in this thread.  Sounds like based on what Ive read that she has a plugged salivary duct underneath her tongue, which grew very rapidly in a period of hours, as described below.  It is long and pointed.
Hi, Thanks for asking the query, Your clinical history suggest that the lesion on the floor of the mouth can be salivary gland swelling, cystic lesion known as vanilla it occurs due to blockage of salivary gland due to stone or any trauma. Blockage of the salivary gland causes increase in pressure in the area resulting in increase in pressure. I would suggest you to visit to an Oral and Maxillofacial Surgeon and get the checkup done, exact diagnosis can be made on visual examination of the area. Hope this helps out. Regards....