What is one of the signs used to diagnose diabetes?

One of the primary signs used to diagnose diabetes is non-fasting glucose levels greater than 200 mg/dL in conjunction with symptoms of diabetes, such as increased thirst, frequent urination, and unexplained weight loss. This diagnostic criterion is part of the American Diabetes Association's guidelines, which help healthcare providers identify individuals with diabetes, particularly when a patient presents with clinical symptoms. Elevated glucose levels indicate that the body is not effectively managing blood sugar, typically due to insulin resistance or inadequate insulin production.

In contrast, increased appetite after meals can occur in various conditions and is not specific to diabetes. A skin rash might be associated with other medical conditions or reactions rather than being a direct indicator of diabetes. Low blood pressure does not relate to the diagnosis of diabetes and can arise from many other health issues. Thus, the measurement of high glucose levels in the presence of symptoms is a clear and established marker for diagnosing diabetes.