Ringing in the ears, also called tinnitus, is not caused by an external sound. It can sound like ringing, but also a buzz, hum, whistle, or other sounds that no one else can hear, except in rare cases ...

Are your ears still ringing from that Victoria line tube journey? Do you lie awake at night, unable to drift off thanks to an annoying humming sound? If you have a recurring ringing or hissing sound ...