Complications of Mumps

Mumps can occasionally cause complications, especially in adults.

Complications can include:

  • inflammation of the testicles (orchitis) in males who have reached puberty; this may lead to a decrease in testicular size (testicular atrophy)
  • inflammation of the ovaries (oophoritis) and/or breast tissue (mastitis)
  • inflammation in the pancreas (pancreatitis)
  • inflammation of the brain (encephalitis)
  • inflammation of the tissue covering the brain and spinal cord (meningitis)
  • deafness

Neither inflammation of the testicles nor inflammation of the ovaries caused by mumps has been shown to lead to infertility.