[header] How to treat aural hematomas in dogs [title] Ask your vet about the surgical draining and sutures. [step] Surgical correction for hematomas is the most common form of correction. It typically requires general anesthesia to keep your dog calm and comfortable. 
Once your dog is under, the vet will make an incision on the underside of the ear flap to drain all the blood out of the pocket. They will then flush out the pocket and place multiple stitches through the ear flap.