Learn about Multiple sclerosis diagnosis at Consumer Reports Health.

Multiple sclerosis

How do doctors diagnose multiple sclerosis?

There isn't any simple test that says you have multiple sclerosis (MS). Because MS symptoms can come and go, it can take awhile to be sure you have the right diagnosis.

MS is a serious disease. Doctors don't want to tell you that you have it if you don't, or tell you everything is OK only to find that you have MS after all. So your doctor might take some time to decide if you have MS.

What to expect

Here are some things your doctor might do to figure out if you have MS. Click on the links below to find out more.

Ask you questions. Your doctor will probably ask you questions to find out more about your symptoms and if they fit with MS.
Give you a physical exam. Your doctor will give you a physical exam to check to see if there are any signs of damage to your nerves.
Do some tests. Your doctor will run tests to see how likely it is that MS is causing your symptoms, or if some other condition might be causing them.

Making the diagnosis

Once the results of all of your tests are in, your doctor can try to make a diagnosis. If you have MS, these tests should show that:

The coating of your nerves (called myelin) has been damaged in at least two places in your brain and spinal cord
Your symptoms aren't caused by another condition.

This information was last updated on Jul 25, 2008

This information is for educational use only, and is not a substitute for prompt professional medical advice. Readers should always consult a physician or other professional for advice and treatment.
© BMJ Publishing Group Limited 2009. All rights reserved.

The information on ConsumerReportsHealth.org should not be viewed as a substitute for a consultation with a medical or health professional. The information is meant to enhance communication with your doctor, not replace it. Consumers Union can not be liable for any loss, injury, or other damages related to your use of this information.

Your use of this information is subject to our User Agreement available at www.ConsumerReportsHealth.org.