Understanding Pitties: Armpit Swelling from Breastfeeding
A comprehensive guide to recognizing, managing, and understanding rare armpit swelling—known as 'pitties'—during breastfeeding.
Everything You Need to Know About Pitties: A Rare Case of Armpit Swelling from Breastfeeding
Breastfeeding comes with many surprises—some beautiful, some challenging, and a few that are truly unexpected. One such phenomenon is the appearance of swelling or lumps in the armpit, commonly referred to by parents and lactation consultants as ‘pitties’. This article offers an in-depth, comprehensive explainer on what pitties are, why they happen, how you can care for them, and when to seek medical attention. Read on for a blend of science, personal stories, and expert-backed guidance for navigating this lesser-known part of the lactation journey.
What Are Pitties?
Pitties describe a condition where breastfeeding parents experience swelling, lumpiness, or even milk accumulation in their armpits during lactation. Though it may sound alarming, lactation experts stress that this phenomenon is a natural—if rare—response to the dramatic changes your body undergoes while producing milk.
- The term ‘pitties’ is informal but has gained traction online as more parents share their experiences on social media, often with viral videos or posts showing visible swelling or even expressions of milk from under the arms.
- Though not everyone who breastfeeds will have pitties, the experience is not as rare as you might think and is simply a sign of the fascinating anatomy behind lactation.
- In some cases, pitties refer specifically to clogged milk ducts in the armpit, potentially leading to localized discomfort, swelling, or even infection known as mastitis.
The Anatomy Behind Pitties: Why Does Armpit Swelling Occur?
Understanding why pitties happen starts with knowing a bit about breast development and structure:
- During fetal development, humans develop milk lines—mammary ridges that extend from the armpits down to the groin.
- Usually, most of this tissue regresses except for a portion on the chest, where the breasts form. But sometimes, residues of this tissue remain along the milk line, including under the arms, leading to accessory (extra) breast tissue.
- When lactation begins, these accessory tissues may respond to hormonal shifts—just like the primary breast tissue—by swelling, producing colostrum or breast milk, and occasionally even leaking it.
- The Tail of Spence, an extension of breast tissue into the armpit, is a particularly common site for swelling.
- Engorgement, or the sudden filling of the breasts (and sometimes armpits) with milk and fluid after birth, can manifest as pain, lumps, or visible swelling in these underarm areas.
How Common Are Pitties?
While not a universal experience, pitties are not as unusual as they seem. Many parents may have mild forms that go unnoticed or resolve quickly:
- The vast majority of lactating people never notice significant underarm swelling, while others might experience only mild tenderness.
- However, with the increase in information-sharing, stories of dramatic armpit engorgement or leaking have been widely shared and destigmatized on social media platforms like TikTok and Twitter.
- Lactation consultants report that while severe cases are uncommon, minor underarm swelling or slight lumps occur frequently among their clients, especially during the first week after birth when milk production is ramping up.
Recognizing the Signs and Symptoms of Pitties
Pitties present with a varied range of symptoms, from barely noticeable fullness to large, firm, and even painful lumps beneath the arm. Key symptoms include:
- Swelling or lump under the armpit, sometimes firm or tender to the touch
- Sensation of fullness or pressure in the underarm, similar to breast engorgement
- Pain or discomfort on movement or when lying on the affected side
- Visible enlargement or protrusion, sometimes with the appearance of a second, smaller breast
- Warmth or redness (uncommon, but possible if inflammation is present)
- Very rarely, leaking of colostrum or breast milk from the underarm area
It’s important to note that most armpit swelling due to lactation is harmless and self-limited, but persistent pain, redness, heat, or systemic symptoms like fever should prompt an evaluation for mastitis or infection.
Causes of Armpit Swelling During Breastfeeding
Multiple factors may contribute to armpit swelling in breastfeeding parents. Understanding these causes can help with prevention and prompt recognition:
- Accessory breast tissue: Extra breast tissue present in the armpit due to incomplete regression of the fetal milk lines.
- Engorgement: Rapid increase in milk supply post-birth may overwhelm not only the breast ducts but also the cells in accessory tissue, resulting in swelling or lumps.
- Clogged milk ducts (pitties): Just like the main breast tissue, the ducts in underarm breast tissue can become blocked, leading to painful lumps that may require attention.
- Mastitis: Infection in the ducts/tissue can cause additional swelling, redness, heat, and pain.
- Ineffective milk drainage: Caused by suboptimal latch, infrequent feedings, or skipped/pumped feeds, resulting in accumulated milk and engorgement in both breast and armpit tissue.
- Tight clothing or compression: High-pressure bras or tight straps can obstruct proper milk flow, contributing to localized swelling or blockages.
- Physical factors: Lying on the stomach or excessive pressure on the breast/armpit tissue during feeds or rest can restrict drainage.
Are Pitties Dangerous? Complications of Armpit Swelling
Although pitties are rarely dangerous, any swelling that is persistent, increasingly painful, or associated with systemic symptoms requires close attention. Possible complications include:
- Mastitis (breast infection): Characterized by pain, warmth, redness, fever, and sometimes pus or worsening local tenderness.
- Abscess formation: If untreated mastitis develops, a pocket of infection may develop that needs medical intervention.
- Milk fistula: In very rare cases, a persistent connection between the duct and skin may form, causing ongoing leakage.
- Chronic lumps or changes: Sometimes the shape of the armpit remains altered even after the acute phase resolves, as described in personal experiences.
However, most pitties resolve spontaneously as the body’s milk production and drainage stabilize a few days to a couple of weeks postpartum. Severe or unusual cases are rare.
Caring for Pitties: Home Remedies and Symptom Relief
Expert-backed tips for easing armpit swelling and discomfort focus on gentle care, patience, and symptom management:
- Cold compresses: Applying a cold pack or icy towel can help reduce swelling and bring comfort, especially during acute engorgement.
- Warm compresses/traditional remedies: Alternating with gentle warmth can soften thickened milk or ease discomfort, but avoid strong heat if redness or infection is present.
- Avoid direct stimulation: Try not to massage or pump the swollen armpit area, as this may worsen swelling or provoke inflammation.
- Supportive, non-restrictive bras: Choose a comfortable nursing bra that offers support without compression.
- Efficient and regular feeding: Maintain a consistent breastfeeding or pumping schedule to promote even drainage throughout the breast and associated tissue.
- Hydration and anti-inflammatory foods: Drink plenty of water and consider anti-inflammatory foods like turmeric for systemic support.
- Pain management: Over-the-counter pain relievers such as acetaminophen or ibuprofen (confirm safety with your provider) may help with discomfort.
Most importantly, observe your body. If swelling does not resolve after a few days or if symptoms worsen, connect with a lactation consultant or healthcare professional.
Can You Prevent Pitties?
Completely preventing pitties may not be possible if you have underlying accessory breast tissue or strong hormonal response to lactation. However, you can potentially reduce your risk or minimize symptoms with these strategies:
- Begin breastfeeding as soon as possible after birth to encourage steady milk flow and drainage.
- Avoid very tight bras, tops, or straps that compress the armpit region.
- Pay attention to your position when sleeping or feeding—avoid lying in a way that places extra pressure on your breasts or armpits.
- If you notice underarm swelling, use supportive rather than restrictive clothing and rest the affected area as much as possible.
- If you have a history of pitties, talk with your medical team or lactation consultant early in postpartum for guidance tailored to you.
When Should You See a Doctor?
Swelling in the armpit during breastfeeding is common and usually resolves on its own. However, seek medical help immediately if you experience:
- Severe, persistent, or worsening pain that does not improve with home remedies
- Redness, heat, or areas that are painful to the touch (signs of inflammation or infection)
- Fever, chills, flu-like aches, or body-wide symptoms
- Swelling or lumps that remain after 1–2 weeks or appear outside the typical time frame for lactational engorgement
- Milk or pus leaking from the skin in unusual locations
If in doubt, cautious assessment by an IBCLC (International Board-Certified Lactation Consultant), primary care doctor, or breastfeeding clinic is always appropriate.
Personal Stories: Real Parents, Real Experiences
Viral social media posts have played a critical role in normalizing the conversation about pitties and shedding light on how many new parents have been surprised by this phenomenon. For example:
- Linda Jones’ Story: After the birth of her triplets, Linda experienced dramatic underarm swelling. “My breast and armpits were rock-hard and swollen,” she recalled, noting that the nurses had rarely seen such extreme engorgement. In her case, a mix of warm and cold compresses helped; the lumps resolved, though her armpits never quite returned to their pre-pregnancy shape.
- Shared Experiences: Other parents have described leaking milk from their armpits, persistent lumps, or the emotional impact of feeling alone in their experience—until they saw someone else share a similar story.
These stories emphasise the importance of community support and open conversation. If you’re experiencing pitties, you are not alone!
Frequently Asked Questions About Pitties
Q: What are pitties and why do they happen?
A: Pitties are areas of swelling or milk accumulation in the armpit related to breastfeeding. They occur due to the extension of breast tissue (the Tail of Spence) into the armpit, which can respond to lactational changes just like primary breast tissue.
Q: Are pitties dangerous?
A: Pitties are usually harmless, but watch for signs of infection such as redness, fever, or worsening pain. Contact a healthcare provider if these symptoms arise.
Q: Can you breastfeed with swelling in your armpit?
A: Yes. Continue breastfeeding or pumping regularly. Effective drainage and consistent feeds help both main breast tissue and any accessory tissue normalize.
Q: How do I make the swelling subside?
A: Use cold compresses for comfort, wear supportive but non-restrictive clothing, and allow your milk supply to regulate naturally. Avoid massaging or compressing the swollen area directly.
Q: Will pitties come back in future pregnancies?
A: For some, especially those with more pronounced accessory tissue, swelling may recur with each pregnancy or bout of lactation. However, the experience can vary between pregnancies.
Quick Reference Table: Pitties vs. Mastitis
| Feature | Pitties | Mastitis |
|---|---|---|
| Main Symptom | Armpit swelling, lumpiness, fullness | Painful, red, hot breast (sometimes armpit too) |
| Location | Underarm (Tail of Spence, accessory tissue) | Breast primarily; may radiate to armpit |
| Systemic Symptoms | Uncommon | Fever, chills, body aches often present |
| Duration | Resolves in days to weeks as milk regulates | May worsen and need antibiotics if untreated |
| Treatment | Compresses, supportive clothing, time | Medical evaluation, possible antibiotics |
Final Thoughts
Pitties—armpit swelling from breastfeeding—are a fascinating, often under-discussed phenomenon that highlight the complexity and adaptability of the human body. For most, this experience will resolve quickly and without intervention, but understanding your body’s signals helps ensure confident, healthy lactation. As with all aspects of parenting, connection and support matter: if you experience anything that worries you, don’t hesitate to reach out to a qualified lactation consultant or your healthcare provider.
