Amber Rose feared she wouldn't feel ''sexy anymore'' after her breast reduction surgery.

The 34-year-old model underwent a three-and-a-half operation in January to go from a 36H to a 36DDD cup size in a bid to ease her chronic back pain which was caused by her mammoth mammaries.

Now, Amber has opened up about why she went under the knife, and admits she contemplated having the procedure for around three years because she was worried about the impact it would have her self-confidence.

In an interview with PEOPLE, she said: ''I was scared that I wouldn't feel sexy anymore, but it got to the point where I literally was in pain. It was almost as if I had like a heavy backpack on my chest.

''They weren't implants or anything like that and so, my back was hurting me. There was times I would just walk and just stop and be like ... it would kill me. And, so, at that point, I was like, this is more of like a health issue, where I have to get this done.''

Amber also revealed that her larges boobs also affected her ability to exercise and caused a variety of difficulties when she was dancing with Maksim Chmerkovskiy on 'Dancing with the Stars' in 2016.

She explained: ''My boobs slowed me down. And, my partner, Maks, would be like, 'Come on! Hurry up, faster, faster, faster.' And, I'm like, 'Dude, I can't go any faster! I'm like in pain. I literally cannot move that fast.'''

Amber - who has five-year-old son Sebastian with her ex-husband, rapper Wiz Khalifa - started to get her large boobs when she was just 14 and she quickly noticed her chest was much bigger than her peers who were also going through puberty.

She said: ''I got my boobs when I was 14, but I would say, over the years, as my weight fluctuated, my boobs fluctuated. And, so, after I had my son, I mean, my boobs, they got bigger. They got way, way bigger. They definitely made me look older when I was a teenager, and also, I felt it made me look heavier as well because they were so big.''