What causes a sore with a hole and redness in my dog's ear canal?

Question

My pup has had this sore in his ear for a bit, any idea what would cause this? He has a vet appointment but I'm just curious. The photo isn't very clear because he wouldn't stay still, but it looks like there is a small hole in the middle, redness around it. Thanks in advance. Pet's info: Dog | American Pit Bull Terrier | Male | neutered | 2 years and 11 months old

Jenny, DVM · Accepted Answer

A bite from a bug or insect can cause that. If he scratched his ears one and made a scab, then it can created an open wound. A small growth or cyst that ruptured can also be an option It is good he is going to the vet because looking in his ear and touching to see how deep it is can really dictate what it is. You can apply a small amount of cortisone cream to it to help with redness until your appointment

What causes a sore with a hole and redness in my dog's ear canal?

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