Take Tab Nimulid 100mg twice a day

Most Important thing to prevent cavities Is to Limit No. Of Intakes Per Day An Intake is anything apart from water taken at one go For eg .. you have 6 cups of coffee / tea during the day  then if you have all 6 in one go then that is considered to be 1 intake but if you have 1 after the other with intervals during the day they will be 6 different intakes So 6 different times carbohydrates were broken down and acid was produced which increases your chances to get cavities

U have to go to a dentist nd get the cavity checked , I think u will need a root canal treatment for the tooth followed by a crown ... U can take ketoro dt tablet presently for relief nd visit the dentist ASAP