I grew a third boob after having a baby — theres…
Jasmine Mamiya was in udder disbelief.
Still recovering in the hospital after giving beginning, the mom-of-two thought she’d seen it all — until a lactation guide casually informed her she’d sprouted an further breast, full with a nipple, in a place no one expects.
“You know how cows and puppies and kittens, they have that line of nipples? Yeah, humans have that too,” Mamiya recalled being told in a now viral TikTok. “I think I had like maybe three hours of collective sleep in the last two days before she tells me this news.”
And she gamely confirmed it off to help other ladies be taught more about their own our bodies.
Jasmine Mamiya sprouted an further breast after giving beginning to her second youngster — and shared all the main points on TikTok. Jasmine Mamiya
The jaw-dropping discovery got here when the guide dropped by Mamiya’s room shortly after she’d given beginning, a commonplace apply meant to help new mothers get the hold of breastfeeding.
“I breastfed my first baby for one and a half years, so, you know, I was thinking there’s nothing this nurse can say that’s gonna surprise me,” Mamiya said.
But as the 2 chatted, the guide talked about that some ladies develop further breast tissue during being pregnant along what medical doctors call the “milk line.”
The invisible strip of tissue runs down both sides of the physique from the armpits to the groin. Everyone has it in the womb, but some people are born with tiny quantities of leftover tissue that keep dormant for years.
Pregnancy, however, flips the change. A surge of hormones targets breast tissue receptors to put together for feeding, and because the additional tissue is biologically similar to common breast tissue, it might swell at the same time, sometimes forming lumps full with further, or supernumerary, nipples.
Mamiya had already suspected she’d developed some of this extra breast tissue after noticing a cussed patch of fats under her armpits that wouldn’t go away.
“It got, like, way darker — like when you’re pregnant your nipples and areola will get really dark, and I’ve noticed the same change with my armpits, so I was like ‘Great, extra breast tissue, I already knew that,’” she said.
Mamiya said the additional growth can swell and turn into tender if she delays common breastfeeding. tiktok/@jasminemia.irl
But when the guide requested to take a look, it took just one look to understand issues had gone to another degree.
“She’s like ‘Yeah, you have a third nipple on your armpit,’ as if that’s like, cute or something,” Mamiya said, admitting she’d assumed the small darkish spot was just a pores and skin tag.
“Telling me that I have an extra nipple on my armpit before I even had my first postpartum poop is diabolical work.”
Mamiya’s revelation despatched the web into a frenzy, racking up more than 3.7 million views in a matter of days. Viewers flooded the remark part, shocked, curious and begging for a peek at her third breast.
“You’re not even gonna buy me dinner first or anything, you just wanna see my underarm boob?” she joked in a follow-up TikTok. “That’s crazy but I’ll show you.”
Lifting her arm, Mamiya revealed the bulge tucked inside her armpit, which is seemingly the most common place for this so-called “accessory breast tissue.”
“It basically just looks like a little bump and the area around it got darker,” she said of the nipple, noting it wasn’t there before she gave beginning. “If I have my arms down it looks normal.”
Mamiya can surgically take away the surplus tissue, but the third nipple is there to keep.
Naturally, customers had questions, including whether or not the additional tissue might produce milk. Spoiler: It sometimes can. But Mamiya has no plans to check that principle.
“If you think I’m gonna stick my breast pump right here and pump my armpit, you are out of your godd—n mind because no,” she said.
“If you pump, you can stimulate milk production,” Mamiya explained. “I am not trying to encourage milk to come out of there.”
She famous, however, that if she goes too long without breastfeeding usually, the lump will get “angry,” swelling and changing into tender. Fortunately, staying on schedule with breastfeeding and pumping has helped keep it under control, along with ice and heat.
For some ladies, further breast tissue shrinks once being pregnant hormones fade, but stretched pores and skin and fatty tissue don’t always return to their pre-pregnancy state.
“My only option is to cut her off I fear, so once I’m done having kids, I can surgically get it removed,” Mamiya said, including that “there’s nothing you can do about the nipple.”
“If she comes, you will accept her,” she quipped. “Those are the only options.”
And while sprouting a shock third boob wasn’t on her 2026 bingo card, Mamiya said it’s not the worst postpartum curveball.
“Who cares? You’ve got a third boob, a fourth boob, it’s really kind of the best case scenario of all medical body changes that go on pre and post baby,” she said.
Mamiya, who usually shares content about mental health and the realities of motherhood, said she posted the video to shine a gentle on the less-talked-about facet of being pregnant and life after it.
Judging by the response, she struck a nerve. Both videos had been crammed with feedback from mothers who’d skilled comparable anatomical adjustments — a membership Mamiya dubbed “The sisterhood of the 3rd nipple.”
“As women and especially mothers, our vulnerability is our strength. There’s so much that’s not talked about and understudied, sharing our experiences honestly and transparently is what will combat that,” Mamiya told The Post.
“There is no experience that millions of women before you have not already gone through, like having armpit boobs!”
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