The pink ribbon that stands for breast cancer awareness is a common sight in October.
But depictions of the stark reality of breast cancer are far less common.
Warning: These are graphic photos, but they're important to understanding how this cancer truly affects women (and men) all around the world.
According to her Tumblr post, they were taken in 2013 during a 35-day radiation treatment.
"[Awareness] is not about saving the boobies," she wrote in her post. "It’s scars, nausea, pain, bald heads, burnt skin, and broken hearts."
Thanks, Jenna, for being real. We need more women like you to show the world we still need to do more to bring the proper awareness to such a heartbreaking disease.
Now Jenna spends her time doing normal, everyday things.
Like hanging with her boyfriend.