Super Junior's Kyuhyun has frequently opened up about his skin trouble, even jokingly ranking himself as the 2nd idol with worst acne after g.o.d's Danny Ahn.

CNBLUE's Yonghwa was known for some of his acne scars. (They say aloe vera is great for acne scars!)

Girls' Generation's Seohyun struggled with whiteheads and red scarring.

TEEN TOP's Chanjo worried fans with his breakouts during 'TEEN TOP & 100%'s Rising Brothers', which was also a busy promotion period for "Be Ma Girl".

EXO's Xiumin was spotted with minor breakouts time to time.

HyunA's trouble with whiteheads was assumed to have been caused by heavy makeup. Many fans demanded that she lighten up her foundation after seeing her breakouts.

BTS's Jungkook was frequently spotted with skin trouble, but ARMYs still adore the maknae no matter what.

B2ST Yoseob's acne persisted for a short while, and was no longer noticeable soon after his debut.

Red Velvet Irene's acne gained attention after she guested on 'A Hyung I Know'.

First generation idol g.o.d's Danny Ahn, as Kyuhyun also mentioned, is one of the first idols known to have suffered with acne.