Ok, that last answer was completely and utterly unhelpfull.
Is the dog constantly scratching at his ears with his paw? And is his ear area foul smelling? My dog has these symptoms and we were told he has canker. We are presently treating him with ear drops called Surolan twice daily which can be bought at your local vets and he is also on antibiotics. After we finish with the Surolan, we have to clean the ear out twice daily using an ear cleanser called Oticlean.
Serious infections can be helped by an operation (sorry, don't know the name of it) which cleans around the inner ear and removes any bacteria. But, in saying this, this operation costs around 1500euro and can have side effects including face paralysis.
I would strongly recommend bringing your dog to the vet, if you already have not, to get him checked out.
Some effective home remedies for treating a painful mouth ulcer or canker sore include rinsing with salt water, applying aloe vera gel, using a baking soda paste, and avoiding spicy or acidic foods.
Effective remedies for treating canker sores include using alum-based treatments. Alum, a natural mineral, can help reduce pain and inflammation associated with canker sores. To use alum for treatment, mix a small amount with water to create a paste and apply it directly to the sore. This can help speed up the healing process and provide relief from discomfort.
FYI canaker sores are not related to oral herpes (the virus that causes cold sores). See related link for some remedies.
Research on the effectiveness of alum treatment for canker sores is limited and inconclusive. Some studies suggest that alum may help reduce pain and promote healing, but more research is needed to determine its overall effectiveness. It is always recommended to consult with a healthcare professional before trying any home remedies for canker sores.
Vaseline
Do nothing - the blister/sore will rupture on its own and the dog will heal over the sore area within a week or so in most cases. If this is a frequent occurrance, I would suggest a trip to the veterinarian to see what is causing the canker sores - this is not a common illness in dogs.
Orajel works on canker sores. Buy it at most pharmacies.
A canker fly (plural canker flies) refers to a fly that eats fruits
Canker sores are not infectious.
Can the bacteria in a dogs mouth possibly give a human being a canker sore? I have owned my dog for about four months and she is a very lovable dog and we cuddle once in a while and she'll occasionally lick my face and around my lips when we are close. I've noticed a much higher icidence of canker sores since I got her. Is she the potential culprit?
Yes, there are home remedies for toy breed dogs like chihuahua. You may have to ask a vet which one is the best for your dog.
Canker sores are diagnosed by observation of the blister.