This is because some of the causes of ear infections in cats can be more widespread problems that cause signs outside of the ears also. (thesprucepets.com)
Ear mites sometimes travel outside of the ear to other parts of the puppy's body. (thesprucepets.com)
They are designed to be comfortable but secure, because they fit into the conch of your ear and create a soft seal, making them a hybrid between classic earbuds that sit outside of your ear canal, and in - the - ear earbuds. (geekwrapped.com)