Hello and Welcome to ‘Ask A Doctor’ service.
I have reviewed your query and here is my advice.
It looks like due to decay in tooth you have developed a
tooth abscess leading to pus formation below the root tips of the tooth..
In such a condition you need proper antibiotics and also treatment of the tooth.
So for now if the
Dentist is not available then atleast consult an Emergency room and get evaluated and start taking a course of antibiotics like Amox-clav and painkillers like
Advil.
Do warm saline gargles and do cool compresses over the cheek.
Once you can see a Dentist you can get an
x ray done so that the condition of the tooth can be checked.
If tooth can be saved then
Root canal treatment can be done.
If the tooth is grossly damaged get it removed under antibiotic cover.
Hope I have answered your query. Let me know if I can assist you further.
Regards,
Dr. Honey Arora