Q. I have a friend who has a cat . His ear is swollen and hard they don't know what happened
A. If the ear flap looks like a little pillow, it is likely an aural hematoma. A blood vessel in the ear flap has ruptured causing the flap to fill with blood and give the pillow appearance. These are most commonly caused by head shaking which in turn is caused by an ear infection. Confirm this with the vet after an exam. Treatment is surgical. The vet will open the flap and drain the blood then suture the ear flap together to prevent further hemorrhage. Afterwards, treating any underlying infection should prevent head shaking. The ear can be drained with a syringe but it usually refills requiring repeated draining and leading to a potentially deformed ear flap.
DR. ANDREA M. BRODIE, DVM
A. There is a possibility that your friend's cat got into a fight and now the ear is abscessed, or the cat has a big hematoma in his ear or the ear is otherwise inflamed or injured. Please ask your friend to take him for a check up at the vet in order to relieve pain and initiate treatment.