What is a CBC?
A CBC, or Complete Blood Count, is a common blood test. It checks the levels of different cells in your blood. These include red blood cells, white blood cells, and platelets. Doctors often use a CBC to look for signs of illness or infection. Because it is simple and quick, a CBC is one of the most ordered blood tests.
Why is a CBC Ordered?
Doctors order a CBC for many reasons. For example, you may need it if you feel tired, weak, or have a fever. Sometimes, a CBC helps find the cause of symptoms. Other times, it checks your health before surgery or during treatment. In addition, a CBC can help monitor ongoing health problems.
How is a CBC Performed?
Getting a CBC is simple. First, a nurse or technician draws a small amount of blood from your arm. Next, the blood goes to a lab for testing. The process usually takes just a few minutes. Most people feel only a quick pinch. Afterward, you can return to your normal activities.
What Do CBC Results Mean?
CBC results show the number and types of blood cells. Each part of the test has a normal range. If your numbers are too high or too low, it may point to a health problem. However, not all changes mean something serious. Sometimes, results can change with age, gender, or even where you live.
Doctors compare your results to the CBC normal range. If your results are outside this range, your doctor will explain what it means for you.
Common Symptoms Leading to a CBC
Many symptoms can lead your doctor to order a CBC. For instance, you may have:
Because these symptoms are common, a CBC helps find the cause quickly.
How to Prepare for a CBC Test
Usually, you do not need to do anything special before a CBC. You can eat and drink as normal. However, if your doctor orders other tests at the same time, you may need to fast. Always ask your healthcare provider if you are unsure. In most cases, you can take your regular medicines before the test.
Understanding Your CBC Report
Your CBC report lists several numbers. Each shows a different part of your blood. For example, it will show your red blood cell count, white blood cell count, and platelet count. Next to each number, you will see the normal range. If a result is outside this range, your doctor will discuss what it means. Sometimes, small changes are not a cause for worry. However, large changes may need more tests or treatment.
When to Consult a Doctor
If your CBC results are not normal, do not panic. Many things can affect your blood counts. For example, a simple infection or even stress can change your results. However, you should always talk to your doctor about your CBC report. Your doctor can explain what the results mean for your health. If you have symptoms like severe tiredness, bleeding, or fever, seek medical help right away.
Sources: Centers for Disease Control and Prevention (CDC), World Health Organization (WHO), and peer-reviewed medical journals.
Consult a healthcare professional for personalized advice about your CBC results.