Pimples on cats’ ears may be caused by cat moss, abscesses, internal heat, mosquito bites, bacterial infections, tissue hyperplasia, etc. First, check whether the cat has parasites and skin diseases. If not, it needs to be sent to the hospital. Check with the hospital to avoid delaying treatment. Pay attention to deworming your cat regularly to avoid being infected with parasites, and try to choose lighter foods for your diet.