A hematoma is a collection of blood outside of blood vessels, usually caused by an injury or trauma. It appears as a swollen area under the skin and can be painful. Full definition
In a 2006 paper published in the International Journal of Legal Medicine, Raul concluded that, biophysically, shaking alone can produce the kinds of subdural hematomas that are seen in SBS cases. (discovermagazine.com)
Aural Hematoma Deafness Ear Mites Feline Ear Disorders Otitis White cats and blindness / deafness (www2.vet.cornell.edu)
One of the more common secondary ear issues seen in veterinary medicine is the development of what is known an ear hematoma in pets, which is often secondary to chronic irritation, ear itching or shaking of the head. (blog.petmeds.com)