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"Real Housewives of Orange County" star Tamra Judge shared on social media that she has skin cancer.

The reality star posted a selfie on Instagram on Saturday wearing short-shorts that revealed a small mole on her butt. While at first glance it appeared to be a sexy snap, the caption told a different, troubling health story.

The 49-year-old fitness champ wrote, "I work out hard for this Booty. I was planning on competing again in November at 50 years old, but I'm not sure that's happening now. it looks like God has a different plan for me."

The star explained, "I'm showing you this picture because this is what melanoma looks like. I don't want sympathy, I want you to save YOUR a--and get your skin checked. This was just a small black flat freckle.... I had no idea! Ill be fine because my faith is strong and my a-- ain't bad either."

Judge shared she is anxious about her recent cancer diagnosis.

"Going to be honest I've been a little sad, worried and pissed off," she concluded. "But we caught it early and that makes me happy. Happy birthday to me. #saveyoura-- birthday party in Cabo not sounding like a good idea now."