Why Do I Hear Cicadas In My Head? The Reason

Hearing a sound that isn’t there can be unsettling, and a high-pitched buzz or ring that resembles cicadas is a common experience. This phantom noise is a real medical symptom called tinnitus, and while it can be distracting, it is rarely a sign of a dangerous medical emergency. The sound you are hearing is generated by your auditory system itself, not by an external source, and understanding why it happens is the first step to managing it.

What Is Tinnitus and Why Does It Sound Like Cicadas?

Tinnitus is the perception of sound when no external sound is present. The sound can be a ringing, buzzing, hissing, roaring, or clicking. The specific “cicada” quality—a rhythmic or constant high-pitched buzz—is one of the most common descriptions of the condition.

The sensation occurs when the hair cells in your inner ear, which are responsible for sending sound signals to your brain, become damaged or irritated. These cells normally send electrical signals to the brain when they detect sound waves. When they are damaged, they can misfire and send random signals. Your brain interprets these random electrical impulses as sound, creating the phantom noise.

What Causes the Phantom Cicada Sound?

Several factors can trigger this misfiring. The most common cause is exposure to loud noise. This can be a one-time event, like a concert or an explosion, or it can be long-term exposure, such as working in a noisy factory or listening to music at high volumes for years. The damage to the hair cells is often permanent, but the tinnitus may fluctuate.

Age-related hearing loss is another leading cause. As you get older, the hair cells in your ear naturally deteriorate. The brain, receiving less input from the ear, may increase its internal “gain” to compensate, which can result in a constant background hum or buzz.

Other causes include earwax buildup, certain medications (especially high doses of aspirin or some antibiotics), and conditions that affect blood flow. In rare cases, a tumor on the auditory nerve can cause tinnitus, but this is usually accompanied by hearing loss in only one ear.

Is It Tinnitus or Something Else?

It is important to distinguish tinnitus from other sounds. If the “cicada” sound is actually rhythmic and in time with your heartbeat, it is called pulsatile tinnitus. This is often caused by blood flow changes in the vessels near your ear and can sometimes indicate a vascular issue that needs medical evaluation.

If the sound is only in one ear, you should have it checked by a doctor. While it can be simple earwax, unilateral tinnitus can also be a sign of a more specific ear issue or, rarely, a neurological problem. A medical professional can perform a hearing test and examine your ear to rule out serious causes.

Why Do I Hear Cicadas In My Head at Night?

Many people find tinnitus is most noticeable when they are trying to fall asleep. This is not because the sound gets louder, but because the environment gets quieter. In a silent room, your brain has less external sound to process, so it pays more attention to the internal phantom noise.

This is a normal response to silence. The lack of competing sounds makes the tinnitus more prominent, which can make it harder to relax and sleep. This often creates a cycle where the frustration of not sleeping makes you more aware of the sound.

What Can You Do to Manage the Sound?

There is no cure for most cases of tinnitus, but there are effective ways to manage it. The goal of treatment is to reduce the contrast between the phantom sound and the silence around you, making it less noticeable.

Sound therapy is a primary strategy. This involves using background noise, such as a fan, a white noise machine, or quiet music, to mask the tinnitus. You do not need to drown it out completely; you only need to make the tinnitus less distinct.

Hearing aids are often helpful for people who have both hearing loss and tinnitus. By amplifying external sounds, hearing aids can reduce the brain’s internal gain and make the phantom sound less prominent.

Behavioral strategies like cognitive behavioral therapy (CBT) can help change your emotional reaction to the sound. The goal is not to make the sound disappear, but to make it less distressing so it does not interfere with your daily life or sleep.

When Should You See a Doctor?

You should see a doctor if the tinnitus is persistent, bothers you frequently, or is accompanied by dizziness, hearing loss, or pain. You should seek medical attention promptly if the sound is in only one ear or if it is pulsatile (in sync with your heartbeat).

Most tinnitus is not dangerous, but a doctor can help identify the underlying cause. They can check for earwax, test your hearing, and review your medications. If a specific cause is found, such as a medication side effect or earwax blockage, treating that cause may resolve the tinnitus.