The 30-year-old explained that she had always had a larger chest, but after deciding in May 2024 to focus on weight loss, her breast size increased from an L cup to an M. That change meant her bust circumference grew by roughly an inch, despite the rest of her body getting smaller.
While the UK-based content creator found it strange that her breasts were growing as her weight dropped, she did not immediately realize something was wrong. It was only after reading health forums online and doing further research, including using ChatGPT, that she began to suspect there was a medical issue behind the changes.
That approach led to cuts and torn skin beneath her breasts, which eventually grew to a size 34NN as she lost a further two stone. She explained: “Bras are impossible. Bras in my size NN don’t exist.”
“I decided to lose weight and eventually started on Mounjaro and lost three stone over the course of a year. In that time my breasts grew from an L cup to an M cup.”
“The side effects are like having numb arms quite a lot and having quite severe indentations on my shoulders,” Moon shared. “I have some light scarring under my breasts where bras have rubbed and ripped the skin open.”
“Also laying on my back is not something I can do for a long period of time as it restricts the amount of air flow I can get in”
Moon said: “It got to the point where last September I was in Amsterdam for the Xbiz awards as I was nominated. I was walking around with another lady and she said, ‘don’t you realise those people are pointing at you and trying to get your attention?'”
“It’s become so normal to me I don’t notice it anymore”
She said: “Originally, he was looking at macromastia, but when I broke down medical history, the weight loss on Mounjaro and the increased growth and side effects, he was point-blank like ‘this is gigantomastia’.”
“I got the diagnosis quite early because of the growth not being common with anything else. At that point, I decided to get rid of the extra weight and protect my back because of the diagnosis.”
Although she is considering breast reduction surgery, the OnlyFans creator has seen a financial boost since developing gigantomastia, earning roughly $13,000 per month.
She said: “I might as well try and reap the benefits of my medical condition rather than the negatives.”
