There are several possible reasons why people with diabetes may be at a higher risk for hearing loss. One factor is high blood sugar levels, which can damage blood vessels and nerves throughout the body, including those in the ears. This damage can reduce blood flow and oxygen supply to the hair cells in the inner ear, which are responsible for detecting sound and transmitting signals to the brain. Over time, this can lead to hearing loss.
Another factor is inflammation, which is a common feature of diabetes. Chronic inflammation can damage cells and tissues in the body, including those in the ear. In addition, some research suggests that diabetes may affect the function of the nerves that transmit sound signals from the inner ear to the brain, leading to hearing problems.
Finally, exposure to loud noises can also contribute to hearing loss. Many people with diabetes already have nerve damage, and excessive sound levels can further damage the nerves responsible for hearing.