When Ole said he’s fine and there is no concussion, it seems to be his own conclusion:
"It’s his neck I think,” Solskjaer said following the 1-0 win. “His head is fine. There is no concussion or anything like that.
“But we have got to do scans.”
To me it sounds that Ole’s best guess was that his head is fine and only the neck took some damage. But the medical staff want to do a scan to see if there is any bleedings or swelling inside his head, or what ever you see in a scan. There is probably a standard protocol for this kind of injuries.