A woman took to Facebook to share how her little sister experienced a rare condition that caused seizure-like symptoms after having her hair curled. Here's what you need to know.

Two-year-old will receive a kidney from a woman who had been following his story on social media. 

A "miracle" surgery changed this little girl's life. 

It's been linked to over-the-counter medications.

The treatment for the rare and life-threatening condition takes just 10 days.

You have to see it to believe it.

It only affects about 10 out of every one million people. 

This might make you paranoid about Legos.

Doctors told the mother she should get an abortion because her baby wouldn't survive. Now, her son is seven months old.

A new article in BMJ Case Reports highlights a rare case of "intranasal retained tooth"—a tooth growing inside a man's naval cavity.

She couldn't understand what her boyfriend was saying—all because of a rare illness. 

The toddler was born with a rare condition called Beckwith-Wiedemann Syndrome, which causes parts of the body to grow at faster rates.

The rare disorder sounds made up, but it's totally legit.

The 16-year-old had an infected hairball in her digestive system, suggesting that she may have had this mysterious and rare disorder.