How to Say “副乳” in English？

How many girls have given up wearing beautiful spaghetti strap tops because of their 副乳 (armpit fat)?
How many have tried countless ways to eliminate it, only to find it completely ineffective?
How many have even become increasingly self-conscious, to the point of anxiety and insecurity?

副乳, often referred to as a stubborn and unnecessary “bug” on the body, is unsightly and impossible to ignore. So what is the proper way to say “副乳” in English, especially in the UK?

Generally speaking, 副乳 refers to accumulated fat in a specific area. Due to its location, it’s commonly described as “armpit fat” or “bra bulge fat” — the noticeable bulge under the armpit or the flesh that spills over from a bra.

In terms of causes, 副乳 can be divided into two types:

• Inherited armpit fat (先天性副乳)

• Acquired armpit fat (后天性副乳)

Inherited armpit fat is relatively rare and is closer in nature to actual breast tissue. On the other hand, acquired armpit fat, also known as pseudo armpit fat (假性副乳), is much more common — and likely the type most people are concerned about. It is not real breast tissue and contains neither nipples nor mammary glands, but is simply excess fat accumulated over time.

What bothers us about 副乳 is that it can result from weight gain, incorrect bras, or prolonged compression. Over time, this results in a stubborn mass of fat lodged under the armpit that’s both hard to eliminate and painfully noticeable. For many women, this is a disheartening reality.

As a result, more and more people are turning to aesthetic treatments to get rid of this unwanted fat. In the past, surgical excision and liposuction were common methods, but due to the higher risks involved, they are gradually being replaced by non-surgical fat reduction treatments.

One of the most popular solutions today is fat freezing treatment (冷冻溶脂).

CoolSculpting® Elite (酷塑冷冻溶脂) is one of the most sought-after treatments for eliminating armpit fat (副乳). This fat reduction technology was developed by Dr. R. Rox Anderson and Dr. Dieter Manstein at the Massachusetts General Hospital, a teaching affiliate of Harvard Medical School. It is manufactured by ZELTIQ AESTHETICS, INC., a renowned medical device company in the United States.

The technology is now used in over 80 countries and regions, with more than 5 million treatment cases worldwide. It has received certifications from the U.S. FDA, China CFDA, and the EU CE, attesting to its safety, effectiveness, and affordability — making it one of the most trusted body sculpting treatments in the world.

CoolSculpting works by targeting fat cells’ intolerance to cold (cold-intolerant). By exposing the fat to a precise cooling temperature, it effectively freezes and kills the fat cells without damaging surrounding tissue. One session can reduce up to 22.4% of fat in the treated area — all without surgery, making it a true “black tech” innovation in body contouring.

Ai Beauty Clinic, based in London, is the first Asian aesthetic clinic in the UK to introduce the latest CoolSculpting® Elite device. The clinic offers official training-certified techniques with fully upgraded equipment, ensuring both safety and visible results.

With such advanced technology, even the most stubborn armpit fat (副乳) should be ready to shiver in fear!