"He kinda just laid down and went about his day and that was the day he was coughing and said his chest hurt, he had a mild cough,” said Baughman's fiancée, Olivia Marcanio.
Within two days, Baguhman's health took a turn. He was running a fever on and off.
On Wednesday, he went to the emergency room, then was flown to UPMC Presbyterian Hospital, where he died less than 24 hours later.
His mom said it was from complications from the flu.
"Organ failure due to septic shock caused by influenza," Beverly Baughman said.
The Baughmans are now left grieving a sudden and most unexpected loss.
They're hoping by sharing his story, it could help save someone else.
"Try and know your body; don't let things go. Whenever you have a fever and you have it multiple days, don't let it go,” said Kyler’s father, Todd Baughman. “Get it taken care of.”
"I think he thought, ‘I just got the flu, I'll be all right, I'll go rest a little bit.’ He was always on the go. I just think he ignored it and thought it would go away like most people, and I think people need to pay more attention to their bodies," Beverly Baughman said.
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