Woolfe received treatment after an incident at a meeting of party MEPs
UKIP leadership favourite Steven Woolfe says he is "feeling fine" after being hospitalised following an "altercation" at a party meeting.
In a statement, the MEP said: "The CT scan has shown that there is no blood clot in the brain. At the moment I am feeling brighter, happier, and smiling as ever. As a precaution, I am being kept in overnight awaiting secondary tests to make sure everything in fine.
"I am sitting up, and said to be looking well. The only consequence at the moment is a bit of numbness on the left hand side of my face," he added.
Earlier, a statement from the UKIP interim leader Nigel Farage said: "I deeply regret that following an altercation that took place at a meeting of UKIP MEPs this morning that Steven Woolfe subsequently collapsed and was taken to hospital."
His condition at the time was said to be 'serious'.
A party spokesman said Mr Woolfe was "taken suddenly ill" in the European Parliament building in Strasbourg on Thursday morning.
The spokesman added: "He has been taken to hospital in the city and he is undergoing tests."
It is reported that Mr Woolfe was injured when he and another MEP left the meeting and squared up on a bridge outside.
Mr Woolfe was reportedly punched in the face and struck his head on an iron railing.
The two men then put their jackets back on and returned to the meeting, and Mr Woolfe collapsed some time later outside the main chamber.
Medics were called after he said he had lost the feeling down one side of his body and he was rushed to hospital.
The incident comes the day after Mr Woolfe, 49, declared he was a candidate for the UKIP leadership following the shock resignation of Diane James earlier this week.
It reportedly happened at what was described as a "clear the air meeting" with MEPs who were unhappy with his admission that he had considered defecting to the Conservatives.
In his statement announcing his candidacy, Mr Woolfe, a barrister, said he had been "enthused" by Theresa May's start to her premiership.
"Her support of new grammar schools, her words on social mobility and the growing evidence that she is committed to a clean Brexit prompted me... to wonder whether our future was within her new Conservative Party," he said.
UKIP has long had a reputation of bitter internal feuding, with a number of high-profile party figures making no secret of their dislike for each other.
The only other candidate to declare so far in the leadership contest, Mr Farage's former aide Raheem Kassam, warned on Wednesday that the party could not look forward to a positive future unless it was able to heal the "internal fractures".
Ms James earlier wished Mr Woolfe a speedy recovery. She said on Twitter: "My thoughts are with @Steven--Woolfe and his wife and daughter at this anxious time and I wish Steven a speedy and full recovery."