The Northern Ireland goalkeeper was found to have a near-fatal blood clot in his lung during last summer’s Nations League match.
After playing in the UEFA Nations League match against Austria, Northern Ireland goalkeeper Trevor Carson was shocked.
His country’s doctors discovered a near-fatal blood clot in his lung.
Which is why the stopper has warned fellow footballers not to hide injury concerns from the medical staff.
“In the end, I was grateful it was just a blood clot,” Carson told Sky Sports News.
“I’d got a clot in my shoulder, but I’d ignored it for that long it broke off into my left lung. It’s called a pulmonary embolism.”
He explained: “It could have lodged in the heart, it could have been fatal and I’m just so grateful.”
“I got wind I was going to play against Austria and being a proud Northern Irishman, everyone says if you play through anything.”
“There was nothing that was going to keep me off the pitch,” he added.
“I had pain in my neck and chest two days before but bottled it up and blagged my way through it and played the game.”
He added: “I didn’t feel anything in the game. It’s amazing what adrenaline can do.”
“I told them (medical staff) it was just a little niggle but if I’ve learned anything from it is honest, tell the physio about these things.”