Hi. Have you noticed any food lodgement in that area? Probably your one tooth or both teeth are decayed and the decay is extending deep towards nerve inside tooth/teeth. Do visit a nearby dentist as early as possible for through diagnosis.You may require Root canal treatment to get relief from this discomfort and to save the tooth from further damage.
Next Steps
Visit a nearby dentist as early as possible for through diagnosis with the help of radiograph
Health Tips
Don't take self medication or clove oil or ointment on that area without any doctor's recommendation.