This is Madeline Milzark, an 18-year-old from Missouri. She's had type 1 diabetes for almost 10 years now.
Last week Milzark wrote a Facebook post about what it's like to live with diabetes, and people have been sharing it across the globe.
The post urges people to ignore stereotypes and reconsider what diabetes really looks like:
"It's a disease that isn't picky when it chooses who to attack, it doesn't care if you're 2 months old or if you're 73. It doesn't care if you eat Big Macs and McChickens every day of your life or if you're a strict vegan who goes to the gym daily. Diabetes is me. Diabetes is a whole ton of people who fight for their life every single day and go to bed not sure if they're going to wake up the next morning. So before you tag your huge dessert #Diabetes, think about what #Diabetes really looks like".