Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns....
As per your complain a piece of skin hanging under the tongue can be a normal anatomical structure known as
Plica Fimbriata and a white bump over it can be a traumatic ulcer caused due to some
injury..
Nothing to worry about it as it does not seems to be serious..
You can do warm saline gargles..
In case of pain you can gargle with a numbing mouthwash..
Take
Ibuprofen to relieve pain and also take a
multivitamin tablet for ten days..
Suck on ice pops and do cold water rinses..
Avoid hard and spicy foods..
Maintain a good
oral hygiene..
In case of no improvement consult an Oral Physician and get evaluated..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora..