Can being sick cause tooth pain?

Yes, when you have a cold or sinus infection, the pressure builds up in your nasal cavities which are very close to your upper teeth, causing them to ache. Since I have thyroid issues, I have to be careful with infections. I suggest consulting your doctor to rule out any actual dental issues if it persists.

Before you spend a lot on expensive dental X-rays, check if you have a cold or sinus block. If the toothache is only in your upper teeth and you are sick, wait a couple of days for the cold to subside. If the pain doesn't go away after your illness, then budget for a dentist visit.

From what I have experienced, sinus congestion during a cold can put pressure on dental nerves, making your teeth feel very sore. I am not completely sure if it is always sinus though. If the pain is severe or if you see swelling, it is best to visit a dentist just to be sure.

Oh absolutely! Your sinuses are basically upstairs neighbors to your upper teeth. When they throw a wild party due to a cold, the floor shakes and your teeth suffer! Once your cold clears up, the peace is restored and the pain should go away.