Fortunately, an infection in general is easy to spot, but you cannot always tell it is yeast from appearance alone.
If your dog has a yeast infection of the outer ear canal, the vet might prescribe a topical antifungal ointment or cream.
Using an otoscope, your vet will be able to look at your dog’s ear canal to determine if the eardrum is intact or if anything is present in the ear canal that could be causing the infection.
The doctor will probably also take a sample of material from in and around the ear, and examine this under the microscope.
It is important to determine whether the infection is caused by yeast, bacteria, or both.
You may notice your dog scratching their ear or rubbing it on the floor or on a piece of furniture.
That's a sign that they may have a yeast infection.
Here's what else to look for: Brown, yellow, or bloody discharge, Odor, Redness or swelling, Crusted skin on the ear flap, Loss of hair around the ear, Head shaking or tilting, Loss of balance, Loss of hearing, Walking in circles, Unusual eye movements.