Reports in Switzerland claim the 84-year-old was rushed to hospital on Thursday, January 7.
According to Blick, Blatter ‘s state of health is considered serious, but he is not believed to be in life-threatening condition.
His daughter Corrina confirmed in a statement he is getting better every day as she asked for privacy.
She told Blick: “My father is in the hospital and is getting better every day. He needs time and rest. On behalf of my family, I ask for privacy.”
This isn’t the first time the Blatter has been hospitalised, with the Swiss suffering health problems in November 2015 and July 2016.
Blatter became the eighth president of FIFA after he secured the role in 1998, was removed from the office back in 2015 after 17 years in charge of the world football’s governing body.
He was banned from all football activity for six years following an investigation into widespread corruption at FIFA under his stewardship.
The Court of Arbitration for Sport ruled that Blatter had authorised payments to Michel Platini, then the European football boss, worth over $2million that amounted to “undue gifts” and therefore violated FIFA’s code of ethics.
The men were banned, initially for eight years before it got reduced to six years by FIFA’s appeals committee in February 2016.
Blatter, who has denied all charges against him, had compared the FIFA Ethics Committee investigation to “the inquisition”. He lost an appeal in the CAS against the suspension in December 2016.