The tube remains suspended in the eardrum by a special flange. Novocain is used to numb the site of the incision and there is minimal discomfort. Once the tube is in place, it can't be felt. Typically, a tube is designed to remain in the ear for about six to nine months. It falls out spontaneously when the natural clearance mechanism of the ear releases it along with wax and other debris.
Some people require more permanent tubes.