Santa Cruz Animal Health understands it is quite common for your cat to shake and rub its head. However, it could be an indication of something more serious, like ear mites, harmful bacteria, or fungus. These conditions are not usually dangerous on their own; they can be extremely painful to your cat. It is always best to contact your veterinarian first before treatment. Santa Cruz Animal Health offers moisturizers to quickly soothe itching, irritation, redness and swelling to deter over-scratching of the ear area.