why does my dog keep shaking his head?

Persistent head shaking in dogs is a common sign of ear discomfort or irritation, most frequently indicating an underlying medical issue. The primary culprit is often an ear infection (otitis externa), caused by bacteria, yeast, or a combination, leading to inflammation, pain, and itching within the ear canal. Other common causes include ear mites (*Otodectes cynotis*), tiny parasites that cause intense pruritus and a characteristic dark, crumbly discharge, particularly prevalent in puppies or dogs with outdoor access.

Foreign objects, such as grass awns, foxtails, or even small insects, can become lodged deep within the ear canal, causing sudden, vigorous head shaking, pawing at the ear, and acute pain. Dogs with environmental or food allergies often experience chronic ear inflammation and itchiness, predisposing them to recurrent ear infections and persistent head shaking. Less common causes include aural polyps, tumors, or aural hematomas (blood blisters) resulting from severe head shaking.

Warning: Never attempt to self-diagnose or treat your dog's ear issues without veterinary guidance. Using inappropriate cleaning solutions or medications can worsen the condition or cause further damage. If your dog is shaking its head frequently or vigorously, especially if accompanied by redness, discharge, odor, or pain, a prompt veterinary examination is crucial to identify the exact cause and initiate appropriate treatment.