This tender discrete spot in your upper neck is a puzzle. Normally these can be trigger points as we discussed earlier and are normally a result of deeper disorders and not a cause of them. Nonetheless, if this spot is not near a dangerous structure (vertebral artery or cord), you could try dry needling. An MRI could also identify it if on a good machine (3.0 Tesla).
Just like how general surgeons identify certain masses by putting a needle into the unknown tissue mass, you could consider that technique to identify the mass but I doubt that you could find a physician who would do that.
NSAIDs can be used by many individuals long term but a liver/kidney lab test needs to be performed every six months to make sure the NSAIDs are not causing problems. If there is GI disturbance, these medications need to be stopped.