Thanks for asking the query,
Toothache is not a uncurable disorder, you need not to worry.
Tell your father not to worry just relax him and explain the procedure.
Give him complete course of analgesic
and antibiotics, you can visit the Dentist
and take an x-ray of the tooth, if the infection is not deep and can be cured the Dentist will perform a Root canal treatment
which will require 2-3 sittings after the treatment a prosthetic crown can be placed.
And if the infection is deep and not curable it is indicated for extraction, it is a simple procedure done under local anesthesia
, so your father will not face pain during the procedure, after it fixed or removable crown can be placed.
If your father is having nay systemic problems then get a Physicians consult done before treatment.
Hope this answer is helpful.