Hi,
Thanks for asking the query,
According to your clinical history i suppose that you have developed infection in your
canine tooth and there is collection of
abscess in the surrounding structure tissue leading to the formation of lump.
There can be a chance of excessive wear in the enamel surface when you were wearing the braces.
I would suggest you to visit the
Dentist and get the thorough clinical examination done take an x-ray of the tooth,
Drainage of the abscess is required.
Go for complete mouth scaling and polishing.
Take a course of antibiotics and analgesics.
If the tooth is restorable can filled with a tooth coloured filling material or if the infection is deep
Root canal Treatment can be performed followed by prosthetic crown placemant.
Hope this helps out.
Regards..