Farah broke onto the athletics scene in 2005, where he started his professional career.
He won his first 5,000m medal at the European Championships in Gothenburg, Sweden.
Since then, he’s gone on to win a whole host of medals and world records.
He’s won four Olympic Gold medals, and six World Championship Gold medals.
“I had a tooth taken out because it was chipped and it got infected,” he told The Guardian.
“I was in a bit of pain, but went for a run, and when I came back from a run I literally collapsed on the bathroom floor, completely knocked out.
“I had my phone in my pocket, so when I woke up and became conscious I called Cam [Levins], my training partner, and he came round and got me on to my bed.
“I was in so much pain from my stomach, and so he called an ambulance and it took me to hospital.