Popular 4th Gen Idol Hit With Cosmetic Procedure Allegations, Triggering Debate

With so much attention placed on celebrities, the pressure to look their best affects many. As a result, some may undergo cosmetic procedures to change their appearance, including non-permanent ones.

21 Korean Celebs Who Have Undergone Cosmetic Procedures Or Surgery

Recently, a popular idol’s alleged appearance change sparked debate.

ATEEZ just returned with “Bad,” and have seen good results from the viral track.

As the group has promoted, some have taken note of alleged changes in Yeosang’s appearance.

ATEEZ’s Yeosang

A comparison of Yeosang’s lips from late November 2025 and a recent photo has gained attention, alleging that the idol may have gotten lip filler. Lip filler involves a solution being injected into the lips to add volume, and usually wears off after 6 months to a year.

Some saw the change as an indication of the cosmetic procedure, and commenting as such.

A diferença 🚬 pic.twitter.com/sTtao2ylUe

— nanda 🦋 VAI VER O BTS (@Sweetb1tt3r) July 20, 2026

As someone who has had lip fillers i noticed it immediately. Those are freshly injected lips babyyyy 😍 https://t.co/Rei1uWXcXD

— z saw ✨ATEEZ ✨ (@zeeee_aaaaa98) July 21, 2026

you don't have to be a genius to figure it out, come on 😂 https://t.co/5SnD1wyVvc

— kafkinha (@kafkinhas) July 22, 2026

Others stated that while getting it done was not a problem, Yeosang’s visual change was more likely attributed to weight loss, and make-up changes.

Let’s stop talking about big mama’s lips oki? It’s been big and medium depending on a makeup style and ever since he lost weight they are more pronounced since his face slimed. Don’t speculate unless he says it himself🫶🏻 (nothing wrong with fillers anyway) https://t.co/0Zioqw1T3u pic.twitter.com/Jy1YCwHu7e

— lizi‎⋆.𐙚 ̊.݁ (@lizi_hehet) July 21, 2026

To the people commenting on his lips, one they have always hidden his bottom lip with makeup because it's not the first time you can see it well and two, I highly believe when he got his teeth contoured he became a bit more confident and stopped pursing his lips so much. You can… https://t.co/E1KpcZhiBv

— Yeosang flexed for me and I'll never be the same🛹 (@Alex082107) July 21, 2026

you know how ateez makeup artist love to contour/concealer their lips??? so his lips is still the same. if you pay attention to him, you will know he is still the same. but if you only see him now, it's you who don't pay enough attention on him. https://t.co/Da7f5a11r7

— ryu (@ouryeosangie) July 22, 2026

Regardless, Yeosang is an adult and he is perfectly able to choose whether or not to get any sort or cosmetic work done.