Thanks for asking the query,
Tooth infection had spread to the periapical tissues leading to formation of abscess
that had bulged extraorally through the chin.
This type of abscess need to be drained followed by the course of antibiotic and analgesic
I would suggest you to take x-ray of the tooth , once the abscess is drained the tooth can be root canal
treated or can be extracted depending on the condition of the tooth.
Take complete course of antibiotic and analgesic, continue with same antibiotic
Use lukewarm saline gargles 3-4 times a day , use antiseptic mouthwash gargles twice daily.
Visit to your Dentist
and get the treatment done .
Hope this helps out.