Diego Maradona was admitted to a clinic in Buenos Aires on Saturday to undergo a scheduled procedure due to stomach bleeding.
Maradona, 58, was diagnosed with a health problem in early January during routine exams performed at the same hospital in the town of Olivos.
He was preparing to travel to Mexico
to take over the technical management of the Dorados de Sinaloa soccer club.
'It is bleeding due to a hernia. It is not complicated at all,' the source told Reuters, adding: 'With this, he hopes to solve some of the inconveniences that he usually has.'
Maradona's side threw away a first-leg lead against Athletico San Luis in the Ascenso MX play-off final last month. The loss meant that Maradona and the team's promotion dream came to an end.
Despite the loss, his agent Matias Morla confirmed that Maradona will be staying on as manager for a second season.