Lena Dunham battling rosacea break-out

Lena Dunham has been diagnosed with skin condition rosacea after taking steroids to treat her joint pain.

The Girls creator and star has opened up about her latest medical complaint in the latest issue of her Lenny Letter blog, revealing she's upset that she can no longer call her "good skin" her favorite feature.

"A few weeks ago, a course of steroids to treat a massive flare of joint pain and instability led to rosacea's appearing overnight, making me look like a scary Victorian doll, two perfect pink circles painted on her porcelain face," she explains.

"After a long, sweaty night shoot in which I was covered in strange makeup, I washed my face to reveal that the rosacea had become hundreds of tiny pimple-blisters that covered me from forehead to neck. The sound that came from that hair and makeup trailer was similar to when the b**ch in the (film) Craft starts losing her hair in the locker room. Terror, rage, and piteous sadness. My face burned, but not as badly as my pride."

"I got used to having good skin over the years," she adds. "Showing up to photo shoots and being told, 'You barely need any makeup at all!' Having other women ask my secret... Gradually I got lazy about my products, but my skin remained dreamy, even through hormone fluctuations, new medications, and daily, sweaty on-set makeup wear.

"Sometimes I forgot to wash my face, and I still glowed. It started to feel like a superpower."

Lena reveals the rosacea break-out led to a trip to the dermatologist, who "extracted infected areas, applied an antibiotic cream, and explained that rosacea is another chronic condition".

The actress and writer, who also suffers from uterus condition endometriosis, decided to share her skin drama to help teenagers struggling with acne and other similar issues understand that no one is immune.

"There are millions of teenagers applying the entirety of their time, resources, and wit to attacking classmates in painfully inventive ways," she continues. "I'm starting to believe that speaking this pain aloud isn't just good for my own healing: it allows any young woman who might be watching to understand that nobody is immune from feeling bad about hateful attention.

''I love myself. I think I'm grand. I hear the voices of the Internet when I get dressed. I have a bunch of blister-pimples. All are true. All are fine. None are forever. I promise you."