*This content was translated by AI.

TWICE member Jeongyeon revealed the story of how she regained her health thanks to her older sister, actress Gong Seung-yeon.
On the 17th, the official account of tvN's variety program "You Quiz on the Block" (hereinafter "You Quiz") posted a preview for the episode airing on the 20th, stating, "Gong Seung-yeon, who was always by Jeongyeon's side as a pillar of support during her most difficult times."

Jeongyeon recalled the time when she first noticed abnormalities in her health, saying, "At that time, I was going through a mentally difficult period." She added, "My sister held onto me and said, 'Your body feels a bit strange. You should probably go to the hospital,' which is how I learned of my accurate diagnosis."
She continued, "I heard the word 'Cushing' for the first time. Thanks to my sister, I am now receiving treatment well and have become healthy, so I am very grateful."
In 2020, during treatment for a neck disc herniation, Jeongyeon was diagnosed with Cushing's syndrome due to side effects from steroids, leading to a rapid weight gain. Despite this, she continued activities as a complete member of TWICE and recently succeeded in losing weight.

Jeongyeon shed tears, saying, "First of all, I'm so happy that my sister is doing so well and is very popular. I am so grateful and sorry that my sister is my biological sister." Upon watching the video, Gong Seung-yeon also showed tears, saying, "I didn't know she would say such things."
Yoo Jae-suk asked, "When Jeongyeon's health deteriorated so much that she had to stop activities for a while, Seung-yeon invited her to live together, is that right?" In response, Gong Seung-yeon said, "At that time, Jeongyeon was going through such a hard time, and I was worried about leaving her alone. At that time, even when she was staying in a dorm, I wanted to go to her dorm and bring her to my house, and I just wanted to keep her by my side. So I suggested we live together. I am so grateful that she has gotten through it."
She also added, "I heard my younger sister say, 'You've become so pretty. You've regained your prime,' and I am also extremely happy. My younger sister is a friend who does everything well, so I trust her without any doubt."
<© STARNEWS. All rights reserved. No reproduction or redistribution allowed.>
*This content was translated by AI.
![Eom Ji-young, Big Picture Failed... 'Explosive Improvisation' National Anthem Singing Controversy Apology [Full Text]](https://image.starnewskorea.com/cdn-cgi/image/f=auto,w=567,h=378,fit=cover,g=face/21/2026/05/2026051711340045148_1.jpg)
![TWICE Jeongyeon discovers 'Cushing's syndrome' thanks to her sister Gong Seung-yeon... "Sister told me, 'Your body feels strange'" [You Quiz on the Block]](https://image.starnewskorea.com/cdn-cgi/image/f=auto,w=567,h=378,fit=cover,g=face/21/2026/05/2026051710544185747_1.jpg)
![Director Yeon Sang-ho: "Director Park Chan-wook, I will do my best" [Cannes★Interview]①](https://image.starnewskorea.com/cdn-cgi/image/f=auto,w=567,h=378,fit=cover,g=face/21/2026/05/2026051707450499169_1.jpg)

![Yoon Bo-mi and Rado's Wedding, Apink in Tears.. Former Member Son Na-eun Absent, Hong Yu-kyung Attends [Comprehensive]](https://image.starnewskorea.com/cdn-cgi/image/f=auto,w=567,h=378,fit=cover,g=face/21/2026/05/2026051710254874897_1.jpg)
![Alpha Drive One 'Congratulations on the double crown!' [★Video]](https://image.starnewskorea.com/cdn-cgi/image/f=auto,w=271,h=188,fit=cover,g=face/21/2026/05/2026051712091017191_1.jpg)
![Kang Shin-hyeo and Park Eun-young, a doctor, to marry today (17th) — same-day new beginnings [Comprehensive]](https://image.starnewskorea.com/cdn-cgi/image/f=auto,w=271,h=188,fit=cover,g=face/21/2026/05/2026051711171571136_1.jpg)
![Eom Ji-young, Big Picture Failed... 'Explosive Improvisation' National Anthem Singing Controversy Apology [Full Text]](https://image.starnewskorea.com/cdn-cgi/image/f=auto,w=271,h=188,fit=cover,g=face/21/2026/05/2026051711340045148_1.jpg)




