Aural hematomas can be addressed several ways. You can use a steroid, drain them and place a steroid inside the ear. Surgical options include placing a drain, the button method, compression device and all of these can range in price. If you do nothing, the blood inside the ear pinna will over time be reabsorbed and then the ear pinna will shrink and be deformed and have the appearance of cauliflower ear similar to boxers and MMA fighters. Dr. Magnifico has more information about hematomas on her blog here: https://kmdvm.blogspot.com/search?q=hematoma