Brief Answer:
Teeth infection, gum infection, root canal treatment, scaling

Detailed Answer:
Thank you for your query. I have gone through your query.
The tooth pain can be because of tooth infection secondary to decay or gum infection. So you need to consult an oral physician and get it evaluated.
If it is secondary to decayed teeth, then the tooth has to be root canal treated.
If the pain is secondary to gum infection, then the teeth needs to be cleaned(scaling).
if I am your treating doctor, I would have suggested you to take a course of antibiotics like Amoxicillin and analgesic like diclofenac (if you are not allergic) and get the teeth treated.
I hope i have answered your query. if you have any queries reply me back. Take care

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