The pop star, who is about to release her third studio album, complained that radio stations will only play particular genres of pop.
"I would have liked to see [the song] Sheezus as a single, but it's not up-tempo enough”, Lily said, before adding: "It's also got the word 'period' in it, which is really offensive to people – even though half the world has to deal with it once a month."
"It's ground-breaking! I'm proud of that", she said, before continuing: "People will wear sweatshirts to my concerts that are just going to say 'period'."
Speaking to Rolling Stone magazine, Lily made it clear that she didn’t think it was her label’s fault.
The 28-year-old sent shockwaves through the music world when she first burst on to the scene in 2006, and her most recent single Hard Out Here, was a welcome return.
Hitting out at gender inequality, the track caused controversy for its expletive-laden lyrics and provocative video.
"You'll find me in the studio, not in the kitchen," sings Lily by way of an introduction, before firing off a series of gender injustices and stating in the chorus that "it's hard out here" for females of the species in the music industry, and the world in general.
"Just going to the shop, want anything Katie?" Lily tweeted
In the interview Lily also revealed that ideally she wouldn’t need a record label, and that she is looking into alternative financing.
"I just want to have more control," she said. "I wish they would let me do it in my way."
The remarks come just a few months after the singer was criticised by Katie Hopkins for gaining weight after having a baby.
Lily replied with a shot of her looking gorgeous in a little black dress and the caption: "Just going to the shop, want anything Katie?"