Complications of mumps

In children, mumps is generally a mild illness, and complications are rare. When complications develop, they may include:

  • Infection of the brain (encephalitis) and/or the membranes that cover it (meningitis).
  • Inflammation of the testicles (orchitis) or ovaries (oophoritis). Orchitis may cause sterility in extremely rare cases; oophoritis does not appear to affect long-term fertility.
  • Hearing loss.
  • Inflammation of the pancreas (pancreatitis).
  • Miscarriage, which may occur in a woman who has mumps during her first 3 months of pregnancy. There does not appear to be a link between mumps and birth defects.1

Adults who are infected with mumps often have more severe symptoms and are more likely to develop complications than children. However, long-lasting problems from complications are rare.



Author: Debby Golonka, MPH
Carrie Henley
Last Updated: May 29, 2007
Medical Review: Anne C. Poinier, MD - Internal Medicine
Michael J. Sexton, MD - Pediatrics
W. David Colby IV, MSc, MD, FRCPC - Infectious Disease

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