Mastitis is one of the more serious breastfeeding complications a nursing or pumping mom can experience, and it can come on quickly and feel alarming. The good news is that with prompt attention and the right approach, most cases resolve fully without long-term impact on breastfeeding. Here is what mastitis is, how to recognize it, how it is treated, and what you can do to prevent it from happening in the first place.
What Is Mastitis?
Mastitis is an inflammation of breast tissue that may or may not involve a bacterial infection. It most commonly occurs in the first few weeks postpartum but can develop at any point during breastfeeding or pumping. According to ABM Clinical Protocol #36, mastitis exists on a spectrum that ranges from localized inflammation and engorgement all the way to more serious complications including abscess if left untreated. Understanding where your symptoms fall on that spectrum is important for getting the right level of care.
The condition typically presents in one breast rather than both, which is one of the key ways to distinguish it from general engorgement. It develops when milk becomes backed up in a duct and the surrounding tissue becomes inflamed, sometimes progressing to infection when bacteria enter through a cracked nipple or other opening in the skin.
Recognizing the Symptoms
The hallmark signs of mastitis include a hard, tender, warm area on one breast, often with visible redness overlying the affected area. The breast may feel wedge-shaped in the area of involvement. Unlike engorgement, mastitis is typically accompanied by flu-like symptoms including fever of 101 degrees Fahrenheit or higher, chills, body aches, and fatigue. The onset can be sudden and the symptoms can feel quite intense, sometimes making it difficult to tell whether you have a breast condition or have come down with an unrelated illness. The combination of localized breast changes alongside systemic symptoms is what distinguishes mastitis from a typical cold or virus.
If you develop any of these symptoms, contacting your healthcare provider promptly is important. Early treatment is associated with significantly better outcomes and reduces the risk of complications. You can also reach out to a Storkpump IBCLC at askanIBCLC@storkpump.com for support while you seek medical care.
Treatment
The cornerstone of mastitis treatment is continued and frequent milk removal. Stopping breastfeeding or pumping during a mastitis episode can worsen the condition by allowing milk to back up further in the affected area. Continuing to nurse from the affected breast, or pumping if nursing is too painful, helps clear the inflammation and supports recovery. Most healthcare providers recommend feeding or pumping every 2 to 3 hours during active mastitis.
For cases involving bacterial infection, a course of antibiotics is typically prescribed. It is important to complete the full course even if symptoms improve quickly. Over-the-counter anti-inflammatories such as ibuprofen can help manage pain and reduce inflammation during treatment. Warm compresses before feeding or pumping can ease discomfort and encourage let-down, while cool compresses after sessions can reduce swelling. Rest and adequate hydration are also important parts of recovery, even though both can feel difficult with a newborn at home.
If you are pumping during a mastitis episode, making sure your flange size is correct and your pump suction is not set too high are important checks. Pumping with a poor fitting flange during active inflammation can worsen discomfort significantly. Use the Storkpump Flange Sizing Guide to verify your fit, and browse insurance-covered pumps on Storkpump if you need a more reliable pump to support you through recovery.
When to Seek Urgent Care
If symptoms worsen significantly despite 24 to 48 hours of antibiotic treatment, or if a firm, fluctuant lump develops in the breast that does not improve with feeding, these may be signs of a breast abscess, which requires drainage by a healthcare provider. Other reasons to seek care urgently include symptoms spreading rapidly, high fever that does not respond to medication, or significant worsening of redness and swelling. Early treatment of mastitis is the most effective prevention strategy for abscess, which is why prompt medical attention at first symptoms matters.
How to Prevent Mastitis
Many cases of mastitis are preventable with consistent attention to a few key practices. The most important is ensuring milk is removed thoroughly and regularly. Going too long between feedings or pumping sessions, skipping sessions, or pumping incompletely are among the most common contributing factors. Avoiding tight-fitting bras or clothing that puts pressure on any part of the breast can prevent localized milk stasis in that area. Treating nipple cracks and soreness promptly reduces the risk of bacteria entering the tissue, and maintaining good hand hygiene before nursing or handling pump parts is a practical prevention step. Regular flange fit checks are also worthwhile, since a poor fit can contribute to inefficient milk removal over time. Visit the Storkpump Learning Center for more guidance on pump maintenance and breast health during lactation.
Mastitis and Milk Supply
One of the biggest concerns moms have when they develop mastitis is whether it will affect their milk supply. In most cases, supply recovers fully with consistent milk removal during and after the episode. Temporary dips in output during active mastitis are common and are not usually a sign of lasting damage. If supply does not return to its previous level after recovery, working with an IBCLC to rebuild through increased pumping frequency and hands-on techniques can help. Browse Storkpump's pump collection to ensure you have a high-quality pump for recovery, and visit the FAQ page for more guidance on supply support.
Frequently Asked Questions
Can I keep breastfeeding if I have mastitis?
Yes, and in most cases you should. Continuing to nurse or pump from the affected breast is an important part of treatment because it prevents further milk backup and helps clear the inflammation. Your milk remains safe for your baby during a mastitis episode, including if you are taking antibiotics, as the antibiotics used to treat mastitis are generally considered compatible with breastfeeding. Always confirm with your healthcare provider that the specific antibiotic prescribed is safe for your baby.
How quickly should mastitis respond to antibiotics?
Most women begin to feel noticeably better within 24 to 48 hours of starting antibiotics, though full resolution of symptoms may take the complete course of treatment, typically 10 to 14 days. If you do not notice improvement within 48 hours or your symptoms worsen, contact your healthcare provider to discuss whether a different antibiotic or further evaluation is needed.
Does mastitis mean I have to stop breastfeeding?
In the vast majority of cases, no. Mastitis is treated while continuing to breastfeed or pump, and stopping abruptly can actually worsen the condition. Many moms go on to breastfeed for months after a mastitis episode with no long-term issues. If pain makes direct nursing difficult during active mastitis, pumping temporarily while you recover is a reasonable approach that protects your supply. Contact a Storkpump IBCLC at askanIBCLC@storkpump.com for personalized support.
Can mastitis occur in moms who exclusively pump?
Yes. Mastitis can affect any lactating person, including those who exclusively pump. Causes in pumping moms often include going too long between sessions, incomplete breast emptying due to poor flange fit, or pump suction that is too high and causing tissue irritation. If you pump exclusively and develop mastitis symptoms, reviewing your pump settings and flange fit alongside seeking medical care is a useful first step. Visit the Storkpump about page to connect with our IBCLC team for support.
Sources
- Amir, L. H., et al. (2022). ABM Clinical Protocol #36: The mastitis spectrum, revised 2022. Breastfeeding Medicine. https://www.bfmed.org/assets/ABM%20Protocol%20%2336.pdf
- Academy of Breastfeeding Medicine Protocol Committee. (2014). ABM Clinical Protocol #4: Mastitis, revised 2014. Breastfeeding Medicine. https://www.bfmed.org/assets/DOCUMENTS/PROTOCOLS/4-mastitis-protocol-english.pdf
- Centers for Disease Control and Prevention. (2026). About breastfeeding. https://www.cdc.gov/breastfeeding/php/about/index.html
Acreditado por ACHC