IU recently held her two-day concert, "The Golden Hour," at the Olympic main stadium in Jamsil Sports Complex in Seoul last weekend and revealed the health issue that has been experiencing for over a year. The K-pop idol revealed she has been suffering from hearing problems, though it's not serious.

After showing her incredible performance, IU confessed to her fans. She admitted the show was a little difficult to do due to her health problem.

She continued that she had problems with her ears, so she was nervous about doing the concert, per AllKpop. Though it isn't serious, she can't control her ears well, which has been bothering her for a year.

However, IU is thankful that her throat condition is fine. But her ears got worse after the performance, so she had a hellish day while rehearsing for two consecutive days.

She didn't have any idea what would happen when she came to the stage. But as she started singing her first song, she said, "I think that you guys really did everything for today's performance."

IU's two-day concert, on September 17 and 18, was her biggest offline solo performance in three years, celebrating her 14th year in the business after debuting in 2008. She was the first Korean female idol to hold a concert at the Olympic main stadium, making her in line with BTS, EXO, and the late Michael Jackson.

A total of 85,000 people graced the event, including some of the most known celebrities, like BTS's Jungkook and J-Hope, TXT's Beomgyu, TWICE's Nayeon, actors Kim Soo-hyun, Lee Joon-gi, and Song Seung-heon. Kang Han-na was also there and Golden Child's Joochan, Manila Bulletin cited.

Jay Park was IU's special guest during her concert's second day. At the time, she announced she would retire the songs "Palette" and "Good Day" from her setlists.

She revealed she composed "Palette" when she was just 25 years old. Now that she's in her 30s, she'll leave the song to her 25-year-old self.

Alternatively, she wrote "Good Day" when she was only 18-part of the lyrics referred to an "oppa," a Korean term for an older male. So, now that she has matured, she rarely sees older men at her concerts.

Though she feels bittersweet not to include these songs in her future setlist, she decided to do new performances with a new list of songs. By the looks of it, fans have something new to look forward to in IU's next concerts.