Our Health Library information does not replace the advice of a doctor. Please be advised that this information is made available to assist our patients to learn more about their health. Our providers may not see and/or treat all topics found herein. Mononucleosis (mono) is a common illness caused by a virus. It can start with a sore throat and swollen glands. And then it can leave you feeling tired and weak for weeks or months. Mono goes away on its own, but rest and good self-care can help you feel better. The virus that usually causes mono—the Epstein-Barr virus (EBV)—can be spread through: EBV isn't spread by casual contact. You can live in the same house with a person who has mono and never be infected with the virus. But a person who has a weakened immune system may be at higher risk for mono. You can pass EBV to others for several weeks or months during and after the time you are first infected with EBV. The virus can also become active and spread to others from time to time throughout your life. The most common symptoms of mono include fever, sore throat, swollen lymph nodes, and feeling tired and weak. Mono can also cause pain in the upper left part of your belly, which may mean that the spleen is enlarged. Symptoms usually start 4 to 6 weeks after you're exposed to the virus. Your doctor will ask you questions about your symptoms and possible exposure to mono. Your doctor will also examine you for signs of mono. This may include looking at your throat, checking your skin, and pressing on your belly. Blood tests to help confirm the diagnosis include: Other tests may be done if complications of mono occur or if the mono tests are negative. Treatment for mono usually involves self-care measures like rest and over-the counter medicines to reduce pain and fever. In severe cases, corticosteroids may be used to reduce swelling of the throat, tonsils, or spleen. Here are some things you can do to ease mono symptoms. When you have mono: Current as of: June 12, 2023 Author: Ignite Healthwise, LLC Staff Current as of: June 12, 2023 Author: Ignite Healthwise, LLC Staff Clinical Review Board This information does not replace the advice of a doctor. Ignite Healthwise, LLC disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use and Privacy Policy. Learn how we develop our content. To learn more about Ignite Healthwise, LLC, visit webmdignite.com. © 2024 Ignite Healthwise, LLC. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Ignite Healthwise, LLC.Topic Contents
Mononucleosis (Mono)
Condition Basics
What is mononucleosis (mono)?
What causes mono and how does it spread?
What are the symptoms?
How is it diagnosed?
How is mono treated?
How can you care for yourself at home?
Related Information
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Clinical Review Board
All Healthwise education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.
All Healthwise education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.
Our Health Library information does not replace the advice of a doctor. Please be advised that this information is made available to assist our patients to learn more about their health. Our providers may not see and/or treat all topics found herein. Current as of: June 12, 2023 Author: Ignite Healthwise, LLC Staff Clinical Review BoardMononucleosis (Mono)
All Healthwise education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.