Bolsonaro survived a near-fatal stabbing in the abdomen while campaigning for the October election.
Since then, he has had a colostomy bag that is due to be removed on Jan. 20, just as the gathering of the world's wealthy and influential business leaders begins at the Swiss Alpine resort.
"He wants to go, but it depends on the doctors," the spokesman said.
A doctor in the team seeing Bolsonaro said the surgery to remove the colostomy bag could be put off until February.
His economic guru and future economy minister Paulo Guedes is expected to be at Davos whether Bolsonaro makes it or not.
Guedes has put together a high-powered team of orthodox economists that plan to privatize state companies and balance the budget to restore investors' confidence in Latin America's largest economy. (Reporting by Rodrigo Viga Gaier in Rio and Aluisio Alves in Sao Paulo Editing by Marguerita Choy)
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