Head shaking in dogs is often a sign of ear discomfort or irritation. Some dogs shake their heads because of ear infections, allergies, trapped debris, ear mites, or inflammation inside the ear canal. While occasional head shaking may not be serious, repeated or forceful shaking usually means something is bothering your dog. Dr. Roger Hart at Bushnell Animal Clinic explains the common causes of head shaking in dogs, what pet owners should look for, and when veterinary care is needed.