Why do ears ring

Understanding Tinnitus

Tinnitus is the perception of sound in the absence of an external noise source. This ringing, buzzing, hissing, or roaring sound occurs inside the ear or head and can range from barely noticeable to severely disruptive. Unlike external sounds, only the affected person can hear tinnitus, making it a uniquely frustrating condition. The sounds may come and go, remain constant, or pulse in rhythm with heartbeat.

Loud Noise Exposure

Prolonged exposure to loud sounds is the leading preventable cause of tinnitus. When sound levels exceed 85 decibels—such as in concerts, construction sites, or from personal music devices—the delicate hair cells in the inner ear can sustain damage. This damage may be temporary or permanent, depending on intensity and duration. Once these hair cells are damaged, they send irregular signals to the brain, interpreted as ringing or buzzing sounds.

Age-Related Hearing Loss

Presbycusis, or age-related hearing loss, is a natural consequence of aging. The hair cells and nerve pathways in the inner ear gradually deteriorate over time, reducing hearing clarity. This process typically becomes noticeable after age 60 and often accompanies tinnitus. The brain compensates for missing sound frequencies by generating phantom sounds, creating the sensation of ringing ears even in quiet environments.

Earwax and Physical Obstruction

Earwax serves as a protective barrier for the ear canal, but excessive buildup can block sound waves. This blockage disrupts normal ear function and can trigger tinnitus sensations. Additionally, infections of the middle or inner ear can cause inflammation that results in ringing. Usually, once the infection clears or earwax is safely removed, the tinnitus resolves.

Other Contributing Factors

Certain medications (including some antibiotics and chemotherapy drugs), head or neck injuries, temporomandibular joint (TMJ) disorders, and cardiovascular conditions can all trigger or worsen tinnitus. Stress and sleep deprivation can exacerbate existing tinnitus, making symptoms more noticeable. Blood vessel issues such as high blood pressure or arteriovenous malformations may cause pulsatile tinnitus, where sound matches the heartbeat.