Fedotowsky shared photos showing the mark from her biopsy and a scar on her abdomen where she previously had cells removed.
She encouraged people to get their skin checked on a regular basis.
"A couple weeks ago I found out I have skin cancer. When my dermatologist used the c-word, I just about fainted in his office. Thankfully, the type of skin cancer I have is rarely fatal and really never fatal when you catch it early. It's called Basal cell carcinoma," Fedotowsky wrote.
"Basal cell carcinoma is super common. The most common skin cancer. You probably know someone who has it. So it's no big deal."
"But what IS a big deal is not treating it and treating it early. That is why going to a dermatologist and getting your skin checked every year is SO important," she said.
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Fedotowsky expressed her gratitude that her cancer was caught early.
"I'm lucky it wasn't melanoma. And I'm lucky that I caught it early," she said.
"Moving forward I plan on making it a priority of mine to use the best natural products on my skin and be rigorous about applying sunscreen and reminding all of you to do the same! I love you guys! Take care of yourselves!"
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