Is the pain only while chewing and radiating towards ear region.
Some reasons for such symptoms are
1. mostly wisdom tooth eruption causing hurt to the gum tissue constantly.
2. Severe infection of the gum and teeth.
3. Any TMJ related issue or malocclusion.
Next Steps
you Need visit a dentist and they would take radiograph to check any issue
Health Tips
avoid eating hard food substance from the affected side.
all the best