If you’ve ever been told you have “fibrocystic breasts,” you’re not alone—and you’re also not alone in feeling confused by what that actually means. Many people leave appointments with this label and little to no explanation. When I teach breast and chest massage to licensed health professionals I find most are not actually clear on what this means. Even the terminology itself can be misleading.
Let’s clear it up.
First: It’s Not a Disease
You may have heard terms like “fibrocystic breast disease” or “benign breast disease.” Both are outdated and, frankly, not very helpful.
- It’s not a disease
- It’s not inherently problematic
- It’s extremely common
The more accurate, modern framework is called ANDI — Aberrations of Normal Development and Involution.
That might sound technical, but it’s actually very reassuring once you understand it.
What Does ANDI Mean?
ANDI recognizes that what we often call “fibrocystic breasts” are simply variations of normal breast tissue changes over time.
Breast tissue is dynamic. It’s constantly responding to hormones, life stages, and physiological shifts. These changes can sometimes feel unfamiliar, uncomfortable, or uneven—but they are usually part of the body’s natural rhythm.
What Is “Involution”?
This is the part most people are never told.
Involution is essentially the counterbalance to development. If development is building and preparing tissue, involution is the process of that tissue receding, reorganizing, or reabsorbing.
And it happens more often than you might think:
1. Monthly (Cyclical) Changes
During the luteal phase of your menstrual cycle (after ovulation), breast tissue prepares for a possible pregnancy under the influence of progesterone:
- Increased secretory / glandular activity
- Fluid retention
- Fullness or tenderness
If pregnancy doesn’t occur, the body reverses these changes—this is involution.
You might notice:
- Decreased fullness after your period starts
- Shifts in texture or sensitivity
2. Weaning from Lactation
The process of weaning can take place very gradually over many years or abruptly over a few weeks, or anything in between. It is simply the process of reducing the frequency of feeds (or pump sessions) over time. During this process as the body shifts into less milk production and eventually stops producing milk altogether, the changes to the tissue that allowed for milk production are reversed. The body gradually:
- Breaks down excess glandular tissue
- Reabsorbs components
- Restructures the breast
This process can sometimes feel:
- Lumpy
- Uneven
- Temporarily tender
3. Over the Lifespan (Perimenopause → Postmenopause)
Over years, the breast transitions from more glandular tissue to more fatty and connective tissue. This process starts as early as age 35 and continues will into the 60s.
This long-term involution can create:
- Areas of firmness or ropey texture
- Changes in density
- New or shifting lumps that are still benign
- Micro-cysts which are a normal part of involution as the tiny milk sacs (alveoli) turn into tiny fluid-filled cysts in the process of resorption.
So Why Do Breasts Feel “Fibrocystic”?
All of these processes—cyclical, postpartum, and lifelong—can lead to:
- Lumpiness or nodularity
- Areas that feel more fibrous
- Tenderness or sensitivity
- Occasional macro-cyst formation (sometimes when a cluster of the aforementioned microcysts combine into one big cyst)
In some cases, mild hormonal fluctuations, hormonal imbalances like estrogen dominance, or local aberrations in the tissue response to normal hormonal cycling all have the potential to amplify these sensations or lead to some benign variations of normal that can include things like:
- Fibroadenomas (small benign growths that feel a bit like a small rubber ball under the skin)
- Fibroadenosis (generalized areas of excess growth of mammary tissue where an area of the breast can feel more dense, nodular and fibrous than the rest, and may become more tender cyclically).
But importantly:
- These are typically benign, self-limiting changes
- They reflect normal physiology, not pathology
- Nearly everyone with breast tissue experiences this to some degree or another, it may just be more pronounced in some individuals who end up with this label.
Think of it less as something “wrong,” and more as the body navigating constant change.
Decades ago doctors were especially inclined to biopsy a lot of these normal variations so many people with breast tissue were ending up with scar tissue throughout their breasts that can impact lymphatic flow and local glandular function. These days doctors are a bit better at limiting biopsies to more concerning findings, instead of pathologizing these normal changes.
When Should You Pay Closer Attention?
Understanding what’s normal helps you better recognize what’s not typical for you.
You should always follow up with a provider if you notice:
- A new lump that doesn’t change with your cycle
- Persistent, localized pain (although cancerous lumps are generally painless)
- Skin changes or unprovoked nipple discharge
- an unexplained abcess
- Anything that simply feels different from your baseline
Education isn’t about dismissing concerns—it’s about giving you context so you can advocate for yourself with clarity.
For those with a family history or otherwise increased risk of breast cancer, Memorial Sloan Kettering Cancer Center in Manhattan has an excellent screening and surveillance program called the RISE Program that I highly recommend.
Where Breast & Chest Massage Comes In
At Red Moon Wellness, this understanding of breast physiology is central to how we support clients. Many of our therapists at Red Moon are trained in breast and chest massage.
I am an approved continuing education provider for licensed massage therapists in New York State, and I teach specialized classes in breast and chest massage for professionals. These trainings are grounded in both clinical knowledge and deeply respectful, body-aware and trauma-informed care.
They include:
- Prenatal breast & chest massage
- Support for lactation and weaning
- Post-surgical recovery and scar massage, including:
- Biopsies
- Lumpectomy and mastectomy
- Breast reconstruction
- Breast reduction
- Gender-affirming top surgery
- Techniques to support lymphatic flow, tissue mobility, and comfort
- Techniques to reduce back and neck pain associated with breast/chest tissue changes.
This work is about helping practitioners understand the real, dynamic nature of breast tissue—so they can support clients through all phases of change, including those often labeled as “fibrocystic.”
A More Empowering Perspective
“Fibrocystic breasts” isn’t a diagnosis to fear—it’s often just a sign that your body is doing what it’s designed to do: adapt, prepare, and recalibrate. It can sometimes be a sign of minor hormonal imbalances or fluctuations and massage therapy can be helpful in reducing symptoms associated with these life cycle changes.
When we shift the language from disease to normal variation, it opens the door to:
- Less fear
- More body literacy
- Better, more informed care
And that’s the goal.
If you’re a looking for specialized massage therapy to support breast and chest health during any phase from prenatal to perimenopausal, you can book a breast/chest health massage at Red Moon 7 days per week.
If you’re a practitioner interested in learning more about breast and chest massage you can explore more about Lena’s upcoming classes here.
When it comes to “fibrocystic breasts”, your body isn’t malfunctioning—it’s communicating. Understanding the language makes all the difference.
