Mayo Clinic Minute: Is tinnitus causing that ringing in your ear?

Have you ever experienced a constant ringing in your ears that you can't pinpoint the cause? It might be tinnitus ('tin-n?-tus) -- the sensation of hearing a sound when no external sound is present. In most cases, tinnitus can be managed, but for some, it's a chronic condition that can affect sleep and everyday function. [...]
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