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Is mononucleosis serious?

Diana Meeks
Diana Meeks on behalf of Sigma Nursing
Family Practitioner

Mononucleosis itself is not usually serious, but the complications can be. Mononucleosis causes sore throat, fever, and fatigue, and in 50% of cases, it causes the spleen to enlarge. An enlarged spleen may rupture, which can be life threatening. Some may also experience liver inflammation. Rare but serious complications include an enlarged heart, brain inflammation, anemia, obstructed airways due to swollen tonsils, clotting problems, and nervous system complications.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.