Jose Mourinho left Chelsea's Premier League title celebrations early on Sunday to visit Ramires.
The Brazilian was admitted to hospital with what Brazilian TV suggests is kidney stones although the new Premier League champions have not yet confirmed the ailment.
Ramires was withdrawn from Chelsea's starting line-up for Sunday's clash with Crystal Palace at Stamford Bridge which the home side won 1-0 to clinch the title.
Juan Cuadrado was the replacement after Ramires opted to be taken straight to hospital from the dressing room.