Understanding the Difference Between Blood Sugar and Blood Pressure

Why health screening results can be confusing

A health screening report can be full of numbers. Blood sugar and blood pressure readings may appear side by side, and hearing that both are “high” can be confusing when you are new to managing your health.

How are blood sugar and blood pressure different?

**Blood sugar** measures the concentration of glucose in your blood. It is expressed in mg/dL, and a fasting blood glucose level of 126 or above can indicate diabetes.

**Blood pressure** measures the force of blood against blood vessel walls as the heart pumps. It is expressed in mmHg and shown as two numbers: systolic/diastolic. A reading of 140/90 or above is considered high blood pressure.

Why are they so often confused?

Both include the word “blood,” are reported as numbers, and share the idea that “high is not good.” But they measure completely different things.

• Blood sugar: the amount of glucose in the blood
• Blood pressure: the force of blood against blood vessel walls

Their management approaches are different, too

Blood sugar management often focuses on food choices, carbohydrate amounts and timing, physical activity, and medication when prescribed.

Blood pressure management often includes limiting sodium, managing stress, staying physically active, and taking medication when prescribed.

Both can be high at the same time

Chronic conditions often occur together. High blood sugar can affect blood vessel health and raise blood pressure, and excess weight can make both more likely. Each condition may require its own management plan.

Summary

• Blood sugar = the concentration of glucose in the blood
• Blood pressure = the pressure exerted on blood vessel walls
• They are different measures and may require different management strategies.
• Having one elevated does not necessarily mean the other is elevated, but they can occur together.