Hello sir..
As per your history it seems you have undergone root canal treatment and capping of the particular teeth...
First and foremost X-RAY has to be taken to rule out the cause of pain... it may be due to re infection of the root canal treated tooth.. if re infection is there then you need to go for RE- ROOT CANAL TREATMENT OF THE PARTICULAR TEETH followed by capping
Next Steps
kindly visit dentist immediately for furthur management
Health Tips
take pain killer of ketorol DT which will provide immediate and temporary relief from pain