Hello and Welcome to HCM,
Thanks for writing to us.
its probably just an infection, rinse your mouth with salty water, but you will probably need to go to the dentist
to get a prescription for an antibiotic!
When a dentist sees the patient, he or she will typically use X-rays to look for any underlying tooth infection
and may drain the boil to offer some relief.
Sometimes, gumboils occur if a person has a piece of food imbedded in the root of a tooth. These may resolve when the tooth is thoroughly cleaned and the irritant removed. Dentists do say that the abscess
should be taken seriously, since they can very often mean a tooth is endangered without treatment.
Hope this helps you.
Wishing you good health...