Hi.
There might be food lodgement in that area which is causing, pain swelling and discomfort
Next Steps
kindly visit nearby dental surgery for physical examination and evaluation
Health Tips
*Advised to use an interdental brush to clean that area.
*Advised warm salt water gargle.
*Advised to pop ice cube in that area.
*If pain persists even after this,get physical examination done
Hope your question is answered