Tinnitus, blood sugar & stress: The surprising connection you need to know
Do you experience that annoying ringing in your ears that just won’t go away?
You might be surprised to learn that it could be linked to your blood sugar balance or your body’s stress response.
Tinnitus is often described as a persistent ringing, buzzing, or humming sound in the ears that isn’t caused by an external source. For some, it comes and goes; for others, it can feel constant and intrusive, affecting concentration, sleep, and overall quality of life. Although commonly thought of as an ear problem, tinnitus can be influenced by factors throughout the body, including circulation, nervous system activity, and even blood sugar regulation.
Tinnitus and blood sugar balance
Tinnitus frequently appears alongside conditions involving metabolic dysfunction, including diabetes, which is considered both a risk factor and a common comorbidity. High blood glucose levels are known to worsen tinnitus symptoms.
Research shows that people with tinnitus often have reduced blood flow in certain brain regions linked to hearing and focus. One key area, the medial prefrontal cortex, supports decision-making, memory, attention, emotional balance, and motivation. Interestingly, studies suggest a strong association between diabetes, tinnitus, and this region of the brain, highlighting just how important blood sugar balance is for both brain and hearing health.
The cochlea, the inner ear structure responsible for hearing, has especially high energy demands and is sensitive to changes in blood flow. Elevated blood glucose can trigger inflammation and oxidative stress, which may damage the cochlea and auditory pathways. Diabetes-related microvascular damage can further reduce blood supply to these structures, while neuropathy may impair the auditory nerve itself. Combined with the effects of insulin resistance on brain signalling, these changes can disrupt how the auditory system processes sound, worsening tinnitus symptoms.
Tinnitus and chronic stress
Stress also plays a significant role in the development and progression of tinnitus.
When we experience stress, the body responds through the adrenal and thyroid hormone pathways, as well as the autonomic nervous system. To adapt, the brain undergoes changes known as neuronal plasticity, a process closely tied to tinnitus. Reduced sound input, such as from hearing loss or auditory nerve damage, can trigger these brain changes and increase the likelihood of tinnitus.
The limbic system, which regulates emotions and memory, is also involved. Stress hormones like cortisol can affect the hippocampus, amygdala, and prefrontal cortex, linking tinnitus with mood and emotional regulation. Over time, ongoing stress and elevated cortisol levels have been connected to anxiety, depression, and worsening tinnitus symptoms.
Finding relief and moving forward
Many people feel discouraged when it comes to finding relief from tinnitus, but it’s important to know that there is hope. Even if the ringing doesn’t disappear completely, steps can be taken to ease its intensity, make it more manageable, and help you feel more in control of your daily life again.
Here are a few actionable takeaways to get started:
- Maintain stable blood sugar by building meals with protein, healthy fats, and fibre.
- Reduce your intake of refined and processed sugars.
- Support stress resilience through mindfulness, breathwork, and nervous system regulation techniques (such as vagus nerve stimulation).
References:
Luo, S., Wen, J., Bao, Q., Ou, H., Yi, S., & Peng, P. (2025). Association between diabetes mellitus and tinnitus: A meta-analysis. Biomolecules & biomedicine, 25(9), 1937–1948. https://doi.org/10.17305/bb.2024.11634
McCormack, A., Edmondson-Jones, M., Mellor, D., Dawes, P., Munro, K.J., Moore, D.R., & Fortnum, H. (2015). Association of dietary factors with presence and severity of Tinnitus in a Middle-aged UK population. https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0114711
Patil, J.D., Alrashid, M.A., Eltabbakh, A., & Fredericks, S. (2023). The association between stress, emotional states, and tinnitus: A mini-review. Frontiers in Aging Neuroscience, 15. https://www.frontiersin.org/journals/aging-neuroscience/articles/10.3389/fnagi.2023.1131979/full
Xia, W., Cui, J., Luo, Y., Xu, J. J., Chen, H., Yin, X., Ma, J., & Wu, Y. (2021). Glucose control has an impact on cerebral blood flow alterations in chronic tinnitus Patients. Frontiers in Neuroscience, 14, 623520. https://doi.org/10.3389/fnins.2020.623520