UPDATE: Kyle Busch Death: New Details Emerge About Sudden Hospitalization

Kyle Busch fans now have a bit more information about what led to his sudden hospitalization and death on Thursday (May 21).

A medical issue from earlier this month is also being revisited, in hindsight.

• NASCAR driver Kyle Busch died on May 21 at age 41.
• Earlier in the day, family shared that he'd been hospitalized with a severe illness.
• Statements from family and Richard Childress Racing offer no details about the nature of his illness or death.

READ MORE: Who Are Kyle Busch's Wife and Kids?

Kyle Busch Calls for a Doctor Mid-Race

The above video is from the May 10 race at Watkins Glen. Broadcasters said Busch was dealing with a sinus issue and his head was stuffed up.

On race radio, the driver can be heard asking for a doctor to meet him at his bus afterward for a shot of some kind. At this point it's not clear his troubles on that day had anything to do with what led to his hospitalization and death on Thursday.

Fans are simply recalling the moment as interesting as they wait for more details about what happened.

Kyle Busch Death, New Details

A cause of death has not been shared, but the Associated Press was able to report what Busch was doing on Wednesday.

Busch was testing a Chevrolet racing simulator in Concord, N.C., when he became unresponsive. He was quickly transported to a hospital in Charlotte, N.C.

Update: TMZ obtained the 911 phone call, which reveals a clearer timeline and that Busch was coughing up blood. The call was placed at about 5:30PM.

"I've got an individual that's shortness of breath, very hot, thinks he's going to pass out, and he's producing a little bit of blood, coughing up some blood," the unnamed male caller says.

Busch, the male adds, was on the floor of the bathroom. He was conscious at the time.

This new news indicates that the racer's affliction was not only severe, but sudden. News was shared the next morning and about seven-and-a-half hours passed between the statements about his hospitalization and death.

Kyle Busch' Wife and Kids

Busch was married to wife Samantha since 2010. The couple had two kids in son Brexton (11 years old on Monday) and daughter Lennix (age 4).

Busch’s final post to Instagram celebrated his son’s birthday.

"Your mom & I are so proud of who you’re turning out to be! You’re the best kid on & off the track, you amaze us every day. Keep doing what you’re doing and there is no limit to what you’ll accomplish! Love you buddy!," he wrote earlier this week.

He's also survived by his older brother, NASCAR Hall of Fame driver Kurt Busch.