Credit: TikTok
People Are Horrified After Learning What The ‘Milk Line’ Actually Is
TikTokers are learning about the ‘milk line’ and are losing their minds about it.
A series of videos have gone viral after people began to learn a lot of new information about the human body.
Woman makes shocking discovery after giving birth
A mother-of-two recently discovered something about her body shortly after the birth of her second child. Not only did it blow her mind but it succeeded in creeping thousands of people out across social media.
The mother, Jasmine, explained how she was breastfeeding with her second child and, having already breastfed her first child, thought she had heard everything regarding the process.
It turns out, she had not. And seemingly all of us are learning something new about the human body because of her.
In her video, Jasmine explains how, on very little sleep, she had a conversation with a lactation consultant that absolutely changed her life.
Jasmine’s lactation consultant asked her if she had noticed any excess breast tissue, to which the mother-of-two answered that she had. In her armpits.
Jasmine also explained to the consultant that her armpits had changed colour, in much the same way women’s nipples and areolas do during pregnancy.
There was no preparing Jasmine for what she was about to be told.
“That’s a nipple. You have a third nipple in your armpit,” the consultant told Jasmine.
According to eMedicineHealth, “It is quite common to have breast tissue up toward and even in the armpit.”
TikTok user’s ‘party trick goes viral
But Jasmine is far from alone with her bonus armpit nipple. Another TikTok video rapidly blew up after one user showed off her ‘party trick’ of being able to squirt milk from her armpit.
TikTok user Eithne_Parr generated a ton of reaction videos and comments after showing off how she could fire thin jets of milk from her armpit.
While one comment described the phenomenon as a ‘party trick’, the new mother did not seem to share the same attitude towards her armpits turning into milk jets, describing the sensation as ‘so weird’.
Naturally, TikTokers everywhere began to melt down in the reaction videos, until one very helpful doctor, along with Jasmine’s aforementioned lactation consultant, came along to explain what was going on with all this excess armpit milk.
What is the ‘milk line?’
It turns out that the excess dairy delivery service is due to the ‘milk line.’
But what is the ‘milk line?’
Fortunately, TikTok is also full of doctors who are on hand to alleviate any fears about unexpected lactation.
In Jasmine’s video, she explains that her consultant revealed to her what the milk line is.
“I’m gagged. You know how cows and puppies and kittens have that line of nipples? Humans have that too.”
@abigailprtr You called? #girlwiththelist #childfree #reasonsnottohavekids OG VID: @jasminemia.irl ♬ original sound – Abigail P (Girl With The List)
Yes. Humans can indeed have a similar line of nipples to those of cats and dogs.
The milk line is part of something known as the ‘mammary ridge’ (which sounds more like a fictional town from a wild west themed adult movie, but I digress) and extends from the armpits to the groin area.
One user replied on TikTok: “So we can just grow udders????” with another adding, “I have one on my bra line and when my daughter was born I learned she has a matching one.”
Another user replied: “As someone that has literally leaked milk from both armpits it was a shock for me and the lactation consultant.”
According to kellymom.com: “Extra nipples or breast tissue is fairly common (1-6% of women) and is a result of incomplete regression of the mammary ridge (milk line) during the development of the embryo before birth.
“Breast development begins around week four of gestation, with two parallel lines of glandular tissue called the milk line (or mammary ridge) extending from slightly beyond the underarm area, down the chest and abdomen, to the groin area and ending near the groin at the inner sides of the thighs (see figure).
@daychulina Información que no pedí pero recibí. vídeo original de @Eithne Parr #womentok #girlsgirl #humoracido #villainera #parati ♬ original sound – Day
“Breasts eventually develop from these lines of tissue, and the remaining tissue regresses. Occasionally, there is an incomplete regression of the mammary ridge during embryo development, and extra (supernumerary) nipples and/or breast tissue forms, usually along this line but occasionally in other parts of the body.
“This can occur in both males and females. An extra nipple, areola, and/or glandular tissue may be present anywhere along this line (a nipple without glandular tissue is most common), and it is not at all unusual to have more than one.”
Jasmine even explains how her lactation consultant told her a story about someone growing an extra nipple… on their thigh.
On TikTok, Dr. Sermed Mezher posted his own follow-up video to Eithne’s armpit lactation video, beginning, ‘unless you’re looking to cure your baby fever, I’d scroll away now.’
@drsermedmezher You Have a Milk Line? Doctor Explains. Sources- PMID 35865040 eithne_parr on TT The milk line, also known as the mammary ridge, is an embryological precursor that forms during the fourth week of human development. In the womb, all humans develop two thickened lines of tissue that run vertically from the armpits, down the chest and abdomen, to the groin. These lines represent the path where mammary glands could potentially develop. In most humans, these ridges naturally disappear everywhere except for the mid-chest area, which eventually becomes the two standard breasts and nipples. However, it is surprisingly common for parts of this ridge to persist after birth, leading to the development of supernumerary (extra) nipples or breast tissue. Approximately 1% to 5% of the population is born with an extra nipple, which most often appears as a small, flat mole-like spot along this original milk line. While these are usually harmless and go unnoticed, they are made of the same tissue as regular breasts, meaning they can sometimes swell or become tender due to hormonal changes during puberty or pregnancy. In very rare cases, fully functional accessory breast tissue can develop in the armpit or elsewhere along the line, highlighting our shared evolutionary history with other mammals that have multiple sets of breasts along these ridges. #milkline #breastfeeding #women #pregnancy ♬ Relaxing lofi music(1014185) – Akase
Dr. Mezher continues: “Armpit involvement is pretty common because of something called the axillary tail. So breastfeeding women do generally find that there can be some pain or some discomfort or even milk leaking from there.
“However, it is not the norm and if you do have an accessory nipple, then hopefully you would know about it already.”
So if excess nipples start firing out pints of milk, at least you can pretty accurately guess what’s going on, now.
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