Skip to content
Includes Expert Content
Ear infection and Mouth/Canker Sore
amykyma posted:
I am currently being treated with an ear infection. On day 2 of the ear infection, I noticed a very sore and swelling throat area (on the same side as my infection) and that night while I was asleep (or trying to sleep) the area turned into a large open sore, probably about the size of my index fingernail. It is now white and filled with pus, but so painful. I imagine this is being caused by the ear infection. Has this same thing happened to anyone else?
amykyma responded:
The sore is located at the back of the mouth, right before/ahead of the tonsil.
Rod Moser, PA, PhD responded:
Canker sore (aphthous ulcers) are not caused by ear infections, but a canker sore in this location can definitely cause ear PAIN (not infection).

Canker sores may be viral or just a break in the protective mucous membrane of the the mouth from abrasion (tooth-brushing, eating, etc.). You can treat this mouth ulcer separately, but they tend to be self-limiting (lasting a few days). Using a topical anesthetic, like the the ones for teething in babies, can help numb the area. There are prescription viscous lidocaine medications, but you would need to call your medical provider.
amykyma replied to Rod Moser, PA, PhD's response:
Thank you so much for your response. This is definately not causing the ear pain as it came on after the infection. Just odd that they both happened around the same time. And I've never had a canker sore this large. Could this possibly be something other than a canker sore?
Rod Moser, PA, PhD replied to amykyma's response:
I guess it is possible to be "something else", but your story does seem to fit the description of a nasty, aphthous ulcer. In order to know for sure, you would need to have a hands-on examination.

Helpful Tips

Your Home Black BagExpert
Doctors used to carry black bags containing all the medical tools they would need for a home visit. Of course, that rarely happens anymore. ... More
Was this Helpful?
32 of 54 found this helpful

Expert Blog

Focus on Flu

Find answers to your questions about seasonal flu issues and answers to your concerns about the flu season and H1N1...Read More

Report Problems With Your Medications to the FDA

FDAYou are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.