When you don’t control diabetes, your body may have too much blood sugar. High levels of sugar in your blood can cause major complications and impact your blood vessels, eyes, heart, and kidneys, according to Verywell Health. You may also experience frequent urination because your body is working hard to flush the excess sugar from your bloodstream. Untreated diabetes can lead to diabetic retinopathy, which can result in blurred vision and eventually vision loss (via the Mayo Clinic). You can also develop gum disease by failing to manage diabetes. Uncontrolled blood sugar leads to higher sugar levels in the mouth, according to Cedars-Sinai.
Furthermore, diabetes can cause nerve damage in your feet, eyes, kidneys, and hands, according to the Centers for Disease Control and Prevention. In addition, it can also damage blood vessels and nerves in your ears, leading to hearing loss. In fact, hearing loss occurs in twice as many people diagnosed with diabetes compared to those who do not have it.