My dog has PIG EAR on one side! What's wrong?

Has your dog been shaking her head alot lately. When dogs shake their heads over and over it throws alot of blood down to their ears and makes them swell. They usually do this if they've just been groomed and had mats on their ears, have ear infections, or something bothering their ears. Check the inside and see if they look infected, she may need to see a vet for medication. And NO, don't puncture the ear!