Transcript for Actress Ariel Winter Shares Details About Her Breast-Reduction Surgery
"Modern family" star Ariel winter opening up about her breast reduction surgery. Revealing in an interview with gam mour.com the physical and emotional pain she was dealing with. Second highest in the class. Reporter: She's best known as the nerdy yet lovable middle sister, Alex, on "Modern family." This morning, Ariel winter is opening up about her deeply personal choice to undergo breast reduction surgery this sum person going from a 36-f to 34-d. Winter sharing the struggled that led to her decision. I could post a photo where I feel good and 500 people comment about how fat I am. Also discussing the physical pain of having a large chest, saying, I had a lot of back problems. It started to hurt so bad that I couldn't take the pain. She wanted to be able to set the record straight, talk about it, it's out there. And kind of answers every kind of question. The physical pain got so bad she couldn't stand up. Every time she would go online, she would sea horrible things. I don't know how you don't have a meltdown every day. Reporter: Winter telling "Glamour" one of the few people she confided in before the surgery, her TV mom, Julie Bowen. She was the only co-star to know what she had been going through. Reporter: Breast reduction surgeries are on the rise. Nearly 115,000 women underwent the proceedier last year. Some of the benefits are feeling better about yourself. Physically and emotionally. And having more self-confidence to walk around and move in the world. Reporter: Winter is hoping sharing her story will inspire others, saying it's something that I did to better my life and my health. I think that can benefit a lot of young girls. I have felt happier with mist than I ever have. For "Good morning America," linsey Davis, ABC news, new York. We're joined by Cindi live. Good to see you. A lot of reaction. Incredibly positive. I mean, even is saying, it's great that she came out and said, she did this and why. And that she feels better about her body. Pi favorite comment was on the Facebook page. One of our readers wrote, this is your decision. I always loved you as an actress for your voice. Your chest is your business. Well said. She didn't tell many of her family members. She told her TV mom, as we just heard. I'm curious. In her decision to talk to glamour. A brave thing to do. She said her sister was a big source of support. Her boyfriend. I think she came to "Glamour" because we take pains to cover a store story like this in a tateful way. I think she wanted to share what she was going through. There's a bigger issue. She was really getting beaten up on social media. She would post a picture she thought she looked great in, I'm sure she looked great in. Immediately, 500 comments. That your breasts are too big? You look fat? Yeah. That's appalling. I love that she wants to help other girms. The body shaming part is present for a lot of people. And the physical pain. She's very careful to say, and I thought this was important in the story, part of the reason she was doing this was she was getting back aches. Her neck hurt. I've heard that. It changes your posture. And you're also embarrassed the. You tend to roll your shoulders forward. Do you think that's partially why the story resonate sod much? We hear stories about girls want to enhance. We're not hearing as much as girls embarrassed. A lot of people are saying, that is something I could benefit from. I think she wanted to talk about this because the emmys are coming up, "Modern family" is nominated. She didn't want the whole conversation to be, wait, what did she have done? It doesn't have an affect on Hur career, do you think it does? No, no. If it makes her feel great and confident, that can only be good for her career. I don't think she did it because of Hollywood. I think she did it because she personally wanted it. It's the only right reason to do it. Your boobs, your body, your choice. One way of putting it. I'm going to needle-point that on a pillow, by the way. Thank you. That's for you. Can I point out the issue it's in. The September issue of "Glamour." You have a great article with tig Notaro. I love the whole issue. She's great. A great documentary. Always great when you're here.
This transcript has been automatically generated and may not be 100% accurate.