How can I tell if I have a cavity?
Many people identify toothaches with a for-sure tooth cavity, but in fact being able to tell if you have a cavity is a little more complicated. There’s no sure way to identify a cavity without a professional evaluation, so it’s best to see your dentist regularly.
Toothaches and your sinuses
If you have a bad cold and also a tooth ache, there is likely a non-cavity-related reason for that. Your sinuses are very near your jawbone, so when the sinus cavities get blocked, it can cause discomfort or pain that seems to be in your teeth.