A bit tricky
These 3 causes of pain can be a bit tricky to sort out sometimes.
If tapping on the suspected tooth increases pain, then it is probably the tooth. Sometimes a troubled tooth causes sinus problems. Sometimes the maxillary sinus (one under your cheek bone) problem causes enough pain to feel like it's in the upper teeth. So, it is best to see your doctor and/or dentist to help sort it out.