Hello there ,
Thanks for writing your query,
indicates bacterial decay or infection in the tooth that involves the tooth nerve tissues or dental pulp.
i suspect the tooth infection
has gone worse and you have developed a periodontal abscess
due to spread of infection to the underlying tissues.
This type of periodontal abscess drains in the oral cavity and may lead to nausea and vomiting.
once the abscess is drained the infected tooth needs to be explored for root canal
you need to get an x ray done the affected area to confirm the presence of infection, approach a dentist
for the treatment.
i would suggest you to start with a antibiotic and analgesic course consulting your dentist , which helps in subsiding the swelling and relives pain.
i hope this helps ,