Thanks for asking the query,
Tooth pain along with swelling indicates infection of the tooth that had spread to the periapical tissue leading to abscess formation.This abscess is drained in the surrounding leading to periodontal abscess
If the abscess is drained in the oral cavity leads to nausea, vomitting.
I would suggest you to visit the Dentist
and get the checkup done take an x-ray of the tooth , drainage
of abscess is required, treatment of the tooth will be either RCT or extraction this depends upon the radiological report.
Start with the course of antibiotics and analgesics, take tab metrogyl
Maintain a good oral hygiene
, use lukewarm saline nad antiseptic mouthrinses.
Hope this helps out.