Menu   WellSpan Health

Health Library

Health Library

Myoglobin (Urine)

Does this test have other names?

Urine myoglobin

What is this test?

This test measures a protein called myoglobin in your urine. The test can help find out whether your muscle tissue has been injured.

Myoglobin is found in your heart and skeletal muscles. There it captures oxygen that muscle cells use for energy. But when you have a heart attack or severe muscle damage, myoglobin is released into your blood. Once there, it can rise to dangerous levels in your body.

Your kidneys filter your blood for myoglobin so that it can be removed from your body in your urine. But too much myoglobin can overwhelm the kidneys and lead to kidney failure. In some cases, this test can help your healthcare provider find the hazard and protect your kidney health.

Why do I need this test?

You may need this test if your healthcare provider suspects that you have a severe muscle injury. Symptoms vary, depending on the cause of muscle damage, but may include:

  • Fever

  • Nausea and vomiting

  • Abdominal pain

You may also have this test if you have serious muscle pain and weakness and dark brown or reddish urine. These are possible signs of rhabdomyolysis, a potentially life-threatening muscle condition that can cause your kidneys to fail. Some cases are tied to the use of statins, a group of cholesterol-lowering drugs.

If your myoglobin level rises too high, you may have to get intravenous fluids or other treatments to help flush the extra myoglobin out of your body. This test will help your provider find out whether your injuries need treatment right away.

What other tests might I have along with this test?

Your healthcare provider may also order other tests. These include:

  • Complete blood count, or CBC, including a differential and platelet count

  • Blood urea nitrogen, or BUN; creatinine; and routine electrolytes, including potassium

  • Calcium, phosphate, albumin, and uric acid

What do my test results mean?

Many things may affect your lab test results. These include the method each lab uses to do the test. Even if your test results are different from the normal value, you may not have a problem. To learn what the results mean for you, talk with your healthcare provider.

Normal results show little or no myoglobin in your urine.

If your results are higher, it may mean you have muscle injury. These are some possible causes of muscle injury:

  • Coma or another situation in which you don't move

  • Surgery

  • Certain infections

  • Poisons and certain medicines

  • Inherited conditions that cause muscle problems

  • Unusually strenuous exercise

How is this test done?

This test requires a urine sample. Your healthcare provider will tell you how to collect it.

Does this test pose any risks?

This test poses no known risks.

What might affect my test results?

Other factors aren't likely to affect your results.

How do I get ready for this test?

You don't need to prepare for this test. But be sure your healthcare provider knows about all medicines, herbs, vitamins, and supplements you are taking. This includes medicines that don't need a prescription and any illicit drugs you may use.  

Myoglobin (Urine) - WellSpan Health

Author: Foster, Sara, RN, MPH
Author: Pascual, Psyche
Online Medical Reviewer: Freeborn, Donna, PhD, CNM, FNP
Online Medical Reviewer: Snyder, Mandy, APRN
Last Review Date: 2015-08-28T00:00:00
Last Modified Date: 2015-10-06T00:00:00
Published Date: 2015-10-06T00:00:00
Last Review Date: 2012-07-27T00:00:00
© 2015 WellSpan Health. All Rights Reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.

I would like to:

Are you sure you would like to cancel?

All information will be lost.

Yes No ×

About the provider search

This search will provide you with WellSpan Medical Group and Northern Lancaster County (Ephrata) Medical Group primary care physicians and specialists. If we don’t have a WellSpan Medical Group physician to meet your criteria, the search will expand to include community physicians who partner with WellSpan Medical Group physicians through the WellSpan Provider Network or provide care to patients on the Medical Staffs of WellSpan’s Hospitals.


Schedule Your Next Appointment Online with MyWellSpan

Use your MyWellSpan patient portal any time to view available appointments, and pick the date and time that best suits your schedule.

Go to MyWellSpan

New to this practice?

If you don't have a WellSpan primary care provider and would like to schedule a new patient appointment with a provider who is accepting patients, just log into your MyWellSpan account, and go to the Appointment Center section. As you progress through the scheduling process, you will be able to see the offices that are accepting new patients in relation to your zip code. If you are not enrolled in MyWellSpan, go to, call 1-866-638-1842 or speak with a member of the staff at a participating facility to sign up. New patient scheduling not available at all practices/programs.

Already a patient at this practice?

If you already have a relationship with a WellSpan practice, simply log into your account, and go to the Appointment Center section. As you progress through the scheduling process, you will be able to schedule an appointment with any provider or practice that already counts you as a patient. Online scheduling varies by practice/program.