Using sweet oil to relieve an earache is a home remedy that is inexpensive and effective. Place the bottle of sweet oil (more commonly known as olive oil) into warm water just long enough for it to become barely warm. Fill the dropper with oil. Tilt your head sideways and release a few drops of sweet oil into the ear. Tear a cotton ball in half and place it in your ear, only far enough to keep the oil from running out. Repeat process for the other ear if necessary.