Welcome to Healthcare Magic Forum
Small custer of while dots sounds like herpes. You should visit a general physician/dermatologist
for a confirm diagnosis & ttreatment. Perhaps when you visited the dentist
, those eruptions were not seen.
Recurrent sores can be related to smoking
, Vit B deficiency, chronic disgestive problems etc.
You can also take homeopathy
for recurrent ulcers/sores.