Labrador Scratching Her Ears Until They Bleed
Intense scratching and nonstop head shaking usually mean the ears are itchy or infected, and in Labradors the most common underlying cause is allergy. Anxiety can make scratching worse, but it rarely starts it.
Ask your vet to look inside the ears and check a swab under the microscope, since hydrocortisone cream won't clear an infection. If there's yeast or bacteria, medicated ear drops usually help within days. An e-collar can protect the skin while it heals. If this keeps happening, ask about an allergy work-up.
See ear infections in dogs and allergies in dogs.
This is general information, not a diagnosis. Please follow your own vet's advice.