By Lori Waite  |  January 29, 2026

Category: Lawsuits to Join

Parents are concerned about fluoride exposure.

Children receive fluoride medicine by a dentist at dental clinic.
(Photo Credit: chanchai plongern/Shutterstock)

Was your child potentially overexposed to fluoride by using Firefly L.O.L. Surprise! Fluoride Rinse?

If your child used Firefly mouthwash at age 6 or younger, you may be eligible to participate in a class action lawsuit investigation. Fill out the form on this page to check your eligibility and learn more.

Fluoride has been widely used in dental care for decades because of its ability to help prevent cavities. In appropriate amounts, fluoride can strengthen tooth enamel and reduce the risk of tooth decay.

However, concerns arise when young children are exposed to too much fluoride during critical stages of tooth development. When exposed to excessive fluoride before the age of 6, children are at increased risk of dental fluorosis, which can be permanent and costly to treat.

With this in mind, some parents are questioning the use of fluoride-containing mouthwash products that are marketed to young children.

Firefly L.O.L. Surprise! Fluoride Rinse is one such product that has drawn attention. A class action lawsuit investigation is currently underway, and parents whose children used Firefly mouthwash before age 6 may be eligible to explore their legal options.

Do you qualify?

If your child used Firefly L.O.L. Surprise! Fluoride Rinse at age 6 or younger and the product was purchased from a store in Illinois, you may be eligible to take legal action.

To verify your eligibility, please complete the form on this page.

Fill out the form on this page for more information.

The law firm responsible for the content of this page is: Siri & Glimstad; New York, New York – National Representation; 888-747-4529; www.sirillp.com.

What is dental fluorosis? 

Dental fluorosis is a condition that can develop when young children consume too much fluoride while their teeth are still forming. Excess fluoride exposure can alter the appearance of both primary (baby) teeth and secondary (permanent) teeth.

In mild cases, dental fluorosis may appear as faint white spots or streaks on the teeth. More severe cases can cause noticeable discoloration, including brown staining, along with surface irregularities or enamel pitting.

Severe dental fluorosis may weaken tooth enamel, making teeth more vulnerable to cavities and decay and potentially leading to costly dental treatment. When dental fluorosis affects secondary teeth, the damage is considered permanent.

Why parents are questioning fluoride mouthwash for kids

Knowing the potential risks associated with excessive fluoride exposure, some parents are increasingly questioning the use of fluoride mouthwash for kids — particularly when those products are brightly packaged, flavored or associated with popular children’s characters. Critics argue that this type of marketing may encourage frequent use or accidental ingestion, potentially increasing fluoride exposure beyond recommended levels for young children.

Firefly L.O.L. Surprise! Fluoride Rinse and children’s oral care

Firefly L.O.L. Surprise! Fluoride Rinse is a fluoride-containing mouthwash marketed for children. Firefly mouthwash is promoted as a great way to prevent cavities and help kids learn healthy oral health habits.

The popular mouthwash has drawn attention as parents and consumer advocates examine the use of fluoride in products intended for young children.

How to join the Firefly Mouthwash class action investigation

A class action lawsuit investigation is currently underway regarding Firefly L.O.L. Surprise! Fluoride Rinse. The investigation examines whether the product may expose young children to excessive levels of fluoride during early tooth development.

If your child was 6 years old or younger at the time they used Firefly mouthwash, you may be eligible to participate in the children’s mouthwash class action investigation. To learn more and verify your eligibility, please complete the form on this page.

See If You Qualify

Join a Firefly L.O.L. Surprise! Fluoride Rinse class action lawsuit investigation

Filling out this form is quick and easy. It only takes a few minutes to see if you qualify.

After you fill out the form, an attorney(s) or their agent(s) may contact you to discuss your legal rights.

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