You are correct, we took the dog to the vet today as his ear was bleeding this morning and it was a hematoma, as you said. They performed surgery this morning. Thank you so much for your correct advice and time.
The lump may be a hematoma, or an accumulation of blood between the skin and cartilage of the ear flap. Another possibility in an older dog would be a tumor. I recommend taking your dog to your veterinarian this week for diagnosis and treatment.
Kimberly Coyner, DVM DACVD