What You Need to Know About Blood Testing: MedlinePlus Medical Test

What are blood tests?Blood tests are used to measure or examine cells, chemicals, proteins, or other substances in the blood. Blood testing, also known as blood work, is one of the most common types of lab tests. Blood work is often included as part of a regular checkup. Blood tests are also used to:Help diagnose certain diseases and conditionsMonitor a chronic disease or condition, such as diabetes or high cholesterolFind out if treatment for a disease is workingCheck how well your organs are working. Your organs include your liver, kidneys, heart, and thyroid.Help diagnose bleeding or clotting disordersFind out if your immune system is having trouble fighting infections What are the different types of blood tests?There are many different types of blood tests. Common ones include:Complete blood count (CBC). This test measures different parts of your blood, including red and white blood cells, platelets, and hemoglobin. A CBC is often included as part of a regular checkup.Basic metabol...