Breast atrophy is when the breasts become smaller and lose their shape. Imagine a balloon that starts out round and big, but then someone slowly lets the air out of it. That's kind of what happens to breasts when they experience atrophy.
Breast atrophy can happen for a few different reasons. One reason is because of aging. As people get older, their bodies change and sometimes things like their breasts can become smaller and less firm. Another reason is if someone loses a lot of weight quickly. When someone loses weight, they also lose some of the fat in their breasts, which can cause them to shrink.
Breast atrophy can be confusing or upsetting for some people, especially if they are used to having larger breasts. However, it's important to remember that everyone's body is different and breast size doesn't define your worth or beauty.