Can a tooth infection cause scratchy throat, itchy, painful ears w/ fluid, & stuffy nose? I am on amoxicillin for tooth & having it pulled next week.

Your symptoms. It sounds like you have two things going on- in addition to the tooth infection you may have a viral infection/common cold. See your dentist as scheduled and consider seeing your primary care physician if you have fever, or your symptoms get worse or don't resolve in a few days.