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If you have a sinus infection, one of the most common—and most irritating—symptoms is a nagging toothache. At first glance, it may not be obvious why an infection or inflammation of the sinuses would cause your teeth to persistently ache. The reason for the connection between the two problems is that the roots of your upper teeth are adjacent to your sinus cavities. Thus, the pressure caused by your sinus infection can translate into a dull pain in your upper teeth—particularly the ones in the back of your mouth. This means that in order to treat the toothache, you need to address your sinus issue. If you’re dealing with an unexplained toothache, it’s time to call a trusted dentist in Renton, WA, so you can schedule an appointment. Your dentist can provide you with a comprehensive exam to discover the source of your toothache—and then offer you the treatment you need.