Tinnitus is a symptom rather than a medical condition. When you have tinnitus, you hear a sound or noise even though there’s nothing in your environment causing the sound. You may hear a variety of phantom noises, such as:

• Ringing
• Buzzing
• Clicking
• Hissing
• Roaring
• Whistling
• Humming

Tinnitus can occur in one or both ears. The sound may remain constant or come and go, and it can be loud enough to affect your concentration or make it hard to hear.