Mastitis symptoms that require medical attention

Call your health professional immediately if you develop signs of mastitis. You may first notice:

  • Chills, aches, and flu-like symptoms.
  • A temperature of 37.8°C (100°F) or higher.

Later you may notice:

  • A reddened, painful area of one breast. This area may be warm to the touch.
  • An increased heart rate (more than 100 beats per minute).
  • Thick, yellow drainage (pus) coming from the nipple.
  • Swollen and tender lymph nodes in your armpit on the same side as the infected breast.


Author: Amy Fackler, MA
Carrie Henley
Last Updated: April 28, 2006
Medical Review: Adam Husney, MD - Family Medicine
Joy Melnikow, MD, MPH - Family Medicine
Liisa Honey, MD, FRCSC - Obstetrics and Gynecology

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