Sheeran told The Sun he dusted himself off and hopped back on, not realising the damage he'd done.
"I got up and cycled home then went to bed and woke up in the morning in a lot of pain and then went to hospital," the singer said.
"I didn't even know anything was broken until the next morning."
Sheeran sustained a broken left elbow, right wrist and a rib in the accident.
The pop star also said he just fell off his bike, contrary to earlier reports stating a car was involved.
Despite his injuries, Sheeran was able to attend the 2017 Q Awards in London, but he cancelled his upcoming shows in Asia.