"By the next day, Ms. Cronin's lips and surrounding skin area had severe blistering and rashes causing her to seek medical care."
The suit, which is "on behalf of (Cronin) herself and the putative class comprised of potentially hundreds of thousands of similarly situated consumers," says Cronin dealt with the skin reaction for 10 days.
It also claims that EOS brands itself as "healthy, as a cure for celebrity problems, and as a travel companion" in viral campaigns that feature celebrities like Britney Spears and Kim Kardashian.
Related: Class-action suit against EOS lip balm reaches settlement
The suit also includes images of other users of the lip balm who have had reactions to the product.
Cronin is seeking damages and corrective advertising in the lawsuit.
EOS has since responded on its Twitter and Facebook pages, in addition to releasing a statement.
"We firmly believe this lawsuit is without merit," a representative for Evolution Of Smooth products said. "Our products are made with the highest quality ingredients and meet or exceed all safety and quality standards set out by our industry and validated by rigorous testing conducted by an independent lab. The health and well-being of our customers is our top priority and millions of satisfied customers use our products every day, many of whom take the time to share their experiences with us."
Some of you may have seen reports of a lawsuit filed against our company. We wanted to be sure that you, our valued...Posted by eos on Wednesday, January 13, 2016