Tinnitus, Stress, and the Brain’s Energy Budget: Why the Ringing May Persist

Tinnitus is often described simply as “ringing in the ears.” But a recent Nature Reviews Disease Primers article makes clear that tinnitus is much more than an ear problem. It is a complex brain–ear condition involving hearing pathways, stress systems, emotional salience, attention, sleep, and large-scale brain networks.

For some people, tinnitus is mild and temporary. For others, it becomes chronic, intrusive, and exhausting. The difference may not depend only on the loudness of the sound. It may depend on whether the brain has enough regulatory capacity to filter, suppress, and adapt to internally generated noise.

This is where a bioenergetic constraint framework may offer a useful way to understand tinnitus.

Tinnitus begins with sound that is not outside

Tinnitus is the conscious perception of sound without an external sound source. It may be heard as ringing, buzzing, hissing, clicking, roaring, or high-pitched noise. The recent Primer estimates that tinnitus affects about 14% of adults, with roughly 2% experiencing severe symptoms.

Many cases are associated with hearing loss, noise exposure, aging, cochlear injury, ototoxic medications, or hidden hearing loss. Hidden hearing loss means that the standard hearing test may appear normal, but subtle damage to cochlear synapses or auditory nerve signaling may still be present.

When auditory input from the ear is reduced, the brain may compensate by increasing the sensitivity of central auditory pathways. This is called increased central gain. In simple terms, the brain turns up the internal volume to detect missing signals.

This compensation may initially be adaptive. The brain is trying to preserve hearing and sensory awareness. But when the gain remains too high, internal neural noise may become consciously perceived as tinnitus.

From compensation to maladaptation

The Primer describes several mechanisms that may contribute to tinnitus persistence: increased central gain, abnormal neural synchrony, thalamocortical dysrhythmia, reduced inhibition, neuroinflammation, and altered predictive coding.

These mechanisms point to a common theme: tinnitus may emerge when the brain’s compensatory response to reduced auditory input becomes maladaptive.

Under normal conditions, the brain can detect irrelevant internal signals and filter them out. It can decide, “This sound is not important.” But when stress, poor sleep, inflammation, aging, or chronic arousal are present, that filtering system may become less effective.

From a bioenergetic constraint perspective, this matters because top-down regulation is not free. Attention control, inhibitory filtering, emotional regulation, sleep recovery, sensory prediction, and executive control all require biological resources. When the system is under strain, the brain may prioritize survival-relevant monitoring over calm, flexible regulation.

In this state, tinnitus may become more than a sound. It becomes a signal the brain cannot ignore.

The salience network: “This matters”

One of the most important ideas in the Primer is that tinnitus-related distress involves the salience network.

The salience network includes regions such as the anterior insula and anterior cingulate cortex. Its role is to detect what is important, urgent, threatening, or behaviorally relevant. It helps the brain decide what deserves attention.

This system is essential for survival. If something dangerous is happening, the brain must notice it quickly. But when the salience network tags tinnitus as important or threatening, the internal sound becomes harder to ignore.

This may explain why tinnitus can feel louder during stress, fatigue, poor sleep, or emotional strain. The actual auditory signal may not be dramatically different, but the brain’s interpretation changes. The sound becomes more salient, more intrusive, and more emotionally charged.

Under bioenergetic constraint, the salience network may dominate because the brain is operating in a defensive mode. Instead of treating tinnitus as irrelevant background noise, the brain keeps monitoring it.

The internal message becomes:

“This sound matters. Keep checking it.”

The central executive network: the brain’s noise manager

The central executive network includes regions such as the dorsolateral prefrontal cortex and posterior parietal cortex. It supports attention control, working memory, cognitive flexibility, decision-making, and task-focused processing.

In tinnitus, this network is important because it helps regulate attention. It allows a person to shift focus away from the tinnitus and toward meaningful tasks, conversation, work, or rest.

The Primer also discusses top-down “noise cancellation” or gating systems involving prefrontal and cingulate regions. These systems help suppress irrelevant internal neural noise. When they function well, the brain can reduce the conscious importance of the tinnitus percept.

But executive control is metabolically demanding. Under aging, chronic stress, sleep disruption, inflammation, or cumulative physiological load, executive regulation may become less available. This does not mean the brain is “weak.” It means the brain may be reallocating limited resources toward vigilance, threat detection, and survival-oriented monitoring.

In that state, the brain may have less capacity to say:

“This is only background noise. Let it go.”

Instead, reduced executive filtering may allow increased internal gain to persist.

The default mode network: when the sound becomes part of the inner world

The default mode network includes medial prefrontal, posterior cingulate, precuneus, hippocampal, and temporal regions. It is active during internal thought, self-reflection, memory, rumination, and mind-wandering.

The Primer notes that tinnitus-related distress is associated with altered default mode network connectivity. This is important because tinnitus often becomes most noticeable during quiet moments, rest, bedtime, or internal reflection.

When the default mode network becomes involved, tinnitus may shift from being a sensory signal to becoming part of the person’s internal narrative:

“Why is this happening?”

“Will it ever stop?”

“What if it gets worse?”

“I cannot escape it.”

This can create a self-reinforcing loop. The more tinnitus is monitored internally, the more salient it becomes. The more salient it becomes, the more difficult it is for executive systems to disengage from it.

In this way, tinnitus can become embedded in the brain’s internal monitoring system.

A three-network model of tinnitus distress

The image accompanying this blog illustrates three major brain networks:

1. The salience network detects importance and threat.

2. The central executive network supports attention control and top-down regulation.

3. The default mode network supports internal focus, memory, and self-referential thought.

Together, these networks help explain why tinnitus is not only about the ear.

When the system is flexible, the salience network can detect tinnitus without overreacting, the executive network can redirect attention, and the default mode network does not become trapped in internal monitoring.

But under stress or bioenergetic constraint, this balance may shift.

The salience network amplifies the tinnitus signal.The executive network becomes less effective at filtering it.The default mode network internalizes and repeatedly revisits it.

The result is not simply “ringing in the ears.” It is a persistent brain state in which internal noise becomes important, intrusive, and difficult to disengage from.

Stress as an amplifier

The Primer highlights stress as a key mechanism in tinnitus chronification. Stress-related circuits overlap with the networks involved in salience, unpleasantness, and suffering. Chronic stress may weaken prefrontal and cingulate regions involved in top-down regulation, while increasing the salience and emotional weight of tinnitus.

This fits closely with a bioenergetic constraint model.

Stress requires energy. So do sleep recovery, immune regulation, sensory filtering, emotional regulation, and cognitive control. When stress is prolonged, the brain may shift toward short-term survival priorities: vigilance, scanning, prediction, and rapid response.

This is useful during acute danger. But when the stress state persists, the cost is reduced flexibility. The brain becomes less able to turn down irrelevant signals.

Tinnitus may therefore persist not only because of auditory injury, but because the system remains in a high-gain, high-salience, low-resolution state.

Neuroinflammation and constrained recovery

The Primer also discusses neuroinflammation as a potential contributor to tinnitus. Peripheral auditory injury may trigger inflammatory signaling, oxidative stress, excitotoxicity, and damage-associated molecular patterns. If these processes remain unresolved, they may promote chronic hyperexcitability and reduced inhibition within auditory pathways.

This is another bridge to the bioenergetic constraint framework.

Inflammation is not just a molecular event; it is an energy-demanding state. Repair, resolution, antioxidant defense, immune regulation, mitochondrial function, and synaptic recalibration all require resources. If the system lacks sufficient recovery capacity, inflammatory signaling may help lock in maladaptive plasticity.

In other words, tinnitus may persist when the nervous system cannot complete the transition from response to resolution.

Why “louder” is not always only louder

One important clinical lesson is that tinnitus suffering is not determined only by sound intensity. Two people may experience similar tinnitus loudness, but very different levels of distress.

The difference may lie in network interpretation.

If the salience network labels the sound as threatening, the tinnitus becomes harder to ignore.If the executive network cannot redirect attention, the sound becomes more intrusive.If the default mode network repeatedly internalizes the sound, the person may become trapped in rumination and monitoring.

This helps explain why sleep, stress, mood, attention, inflammation, and cognitive load can change the experience of tinnitus even when the original auditory injury remains stable.

Clinical implications: from suppression to restoring regulation

Current tinnitus care focuses less on eliminating the sound and more on reducing its impact. The Primer emphasizes counselling, cognitive behavioural therapy, hearing rehabilitation, sound strategies, treatment of somatosensory contributors, and management of comorbidities such as insomnia, anxiety, depression, hyperacusis, migraine, neck pain, and temporomandibular disorders.

A bioenergetic constraint perspective does not replace these approaches. It helps explain why they may work.

Counselling reduces threat interpretation.Cognitive behavioural therapy improves cognitive and emotional regulation.Hearing aids reduce sensory deprivation and may lower compensatory gain.Sleep restoration improves regulatory capacity.Stress reduction lowers salience amplification.Physical therapy or dental treatment may reduce somatosensory input into auditory pathways.Treatment of anxiety, depression, migraine, or insomnia reduces competing biological load.

The goal is not simply to “fight the sound.” The goal is to restore enough regulatory flexibility so the brain can stop treating the sound as an emergency.

A simple model

Tinnitus may begin with auditory injury or altered sensory input.

The brain compensates by increasing central gain.

If recovery capacity is adequate, the brain may adapt and the tinnitus may remain mild or fade into the background.

But if aging, stress, sleep disruption, inflammation, or cumulative load constrain regulatory capacity, the system may shift into a maladaptive loop:

Reduced auditory input → increased central gain → salience tagging → emotional distress → internal monitoring → reduced executive filtering → persistent tinnitus awareness.

This is not “all in the mind.” It is a real neurobiological process involving the ear, brainstem, auditory cortex, salience network, executive network, default mode network, autonomic system, stress biology, and immune signaling.

The hopeful message

The bioenergetic constraint framework also offers a hopeful message.

If tinnitus distress reflects a loss of regulatory flexibility, then improvement does not require the sound to disappear completely. Improvement can come from changing the brain’s relationship to the sound.

When the body is less stressed, sleep improves, hearing input is supported, inflammation is reduced, and attention becomes more flexible, the brain may gradually stop assigning high priority to the tinnitus signal.

The sound may still be present, but it becomes less dominant.

The goal is not always silence. Sometimes the goal is freedom from monitoring.

Reference

Vanneste, S., De Ridder, D., Gallus, S., Husain, F. T., Kleinjung, T., Langguth, B., Lopez-Escamez, J. A., Schlee, W., Yasoda-Mohan, A., & Elgoyhen, A. B. (2026). Tinnitus. Nature Reviews Disease Primers, 12, 29. https://doi.org/10.1038/s41572-026-00702-0