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We are experiencing high call volumes in response to expanded COVID vaccination scheduling. Vaccine supplies in Idaho are limited. Please do not call St. Luke’s clinics directly regarding COVID-19 vaccination. Appointments are made through myChart as vaccine is available; we are not able to accommodate walk-ins. Unless you need to call for an emergency, you are encouraged to use myChart for questions and appointments at this time. Find additional information here.

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Mastitis (breast inflammation)

Mastitis (breast inflammation)

Mastitis is an inflammation of the breast that occurs most commonly in breastfeeding women; it can be related to tissue injury, infection, or both. Breastfeeding mastitis is typically caused by bacteria that enter the breast through a cracked or sore nipple.

Signs of infection may include:

  • Increased pain, swelling, redness, or warmth in an area on a breast.
  • Red streaks extending from a breast.
  • Drainage of pus coming from a breast.
  • Swollen lymph nodes in the neck or armpit.
  • Flu-like symptoms, such as fever of 101°F (38.5°C) or higher, chills, and fatigue.

Treatment usually involves antibiotic medicines, keeping up milk flow, and measures to relieve discomfort. While they are being treated, most women can safely continue to breastfeed or pump breast milk.

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