Undiluted tea tree oil is potent. Applying it directly to the ear canal can cause immediate burning, stinging, redness, and blistering. Even diluted oil can cause allergic contact dermatitis in sensitive individuals. Symptoms include intense itching, swelling, and a weeping rash inside and around the ear.
It is important to note that tea tree oil is frequently used to treat ear mites in dogs and cats. However, , as the concentration safe for humans can be toxic to animals, especially cats and small dogs. tea tree oil for ears