The 'Impossible' singer uploaded a picture to Twitter on Monday night (23 June) after apparently becoming embroiled in an altercation while abroad.
James wrote alongside his image: "Polish bar brawls are the best."
When worried fans asked about his wellbeing, he replied: "Don't worry. I'm absolutely fine and in good health. Just a couple of bumps and scratches in a scuffle. Boys will be boys."
He didn't give any further details.
James - who was crowned X Factor winner in 2012 - was in Poland to perform at the wRomantic Festival in Wroclaw.
Earlier this month, the singer confirmed he had parted ways with Simon Cowell's record label Syco, where he'd been signed after X Factor.
He tweeted on 11 June: ""Just to clear things up - I am no longer with Syco. I would like to thank all at the label for making a great record with me. I now have to move on and do something different - the future is bright! #LOVE."
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Listen to James' song 'Impossible' below: