Yolanda Foster has started a trend on social media.

RHOBH's Yolanda Foster Continues Her Battle With Lyme Disease

After a years-long battle with Lyme disease, the Real Housewives of Beverly Hills star encouraged her co-stars, and others, to support the Lyme Disease Challenge, which requires users to submit a photo of themselves taking a bite out of a lime.

"It takes a village, please pass it on........ #WeMustFindACure #LymeDiseaseChallenge #TakeABiteOutOfLyme I challenge @Lisavanderpump @kylerichards18 @lisarinna @eileendavidson @brandiglanville2 @kimrichards11 @bravoandy @dr_Oz," Foster wrote on Instagram last week, along with a photo of her and her husband, David Foster, participating in the challenge.

Yolanda Foster Took Avril Lavigne Under Her Wing After She Was Diagnosed With Lyme Disease

According to the New York Daily News, the Lyme Disease Challenge encourages users to share a brief fact about Lyme disease in the caption of their photo, and also to donate $10 to the International Lyme and Associated Diseases Society. For those who don't want to take an actual bite out of lime, a $100 donation is suggested.