Tinnitus is a ringing, humming, pulsing or hissing sound in your ear. The sounds, which vary from person to person, are created by your own hearing system. It's the feeling of hearing noises when no sound is actually present.
This is a companion discussion topic for the original article at https://patient.info/news-and-features/signs-of-tinnitus-to-look-out-for-in-children