He described it as I looked like cookies and cream pudding.

Like I was that shade of gray.

And he's like, I'm taking a straight to the emergency room.

A lot of doctors, either they've never heard of it

or they don't believe it exists.

These patients are just ignored because it's very difficult

to recognize that there's something going on.

I just remember praying in the room

to let me meet my daughter, my God's grace,

to let me get through this with my wife.

I didn't want it to all end before it all started.

How terrifying would it be to fight an unknown enemy?

One, you didn't recognize and didn't see coming.

What if that enemy was coming from within?

A disease that even doctors couldn't identify.

Nearly half of all Americans suffer from some chronic illness

and many struggle for an accurate diagnosis.

These are their stories.

I'm Lauren Bright the Checo and this is Symptomatic.

You're immediately hit with a feeling

like you're talking to a close friend

when you meet Shelby Morrison.

...