Model and TV presenter Luciana Giminez, who remains very close to the Rolling Stone, with whom she has 25-year-old son Lucas, shared the news on Friday, Dailymail report.
'This week I had to undergo an emergency surgical procedure but everything is fine and I'm already recovering properly,' she said.
Adding: 'At these times we know how loved, precious and cherished we are. I'm receiving a lot of affection!'
Luciana, 55, who became pregnant with Mick's child while he was unofficially married to Texan supermodel Jerry Hall, shared online the doctor's note after her hospital visit in Brazil.
'Luciana underwent emergency surgery to correct a herniated cervical disc,' it read. 'The procedure was performed by Dr. Alberto Gotfryd's team at the Albert Einstein Israelite Hospital and was successful.'
She also shared photos on social media of herself in the hospital bed with a neck brace on.
'I think I enjoyed Carnival so much that now I had to make up for it - but that's part of it,' admitted Luciana, who will now undergo rest and physiotherapy to get her back on track.
She added: 'There are times when we need to look after ourselves and receive the right treatment. I am in the hands of a great medical team. The important thing is that I'll be back soon and full of energy.'
Speaking of her close bond with Mick, 81, Luciana has said: 'Lucas and Mick are really close and Mick is a wonderful dad.
'I like to raise my child with his dad, with his help and advice. He's a very wise man and he is passionate about his kids. He's always been there and that has been a really great experience.'
It comes just after Luciana came up with an ingenius way to defy ageing - by pretending you're much younger.
