Suspended Fifa president Sepp Blatter has undergone stress-related health checks in hospital, according to his lawyer Richard Cullen.
Blatter, 79, who has led the governing body for 18 years, was provisionally suspended for 90 days last month amid a much-publicised corruption scandal.
Cullen said: "He is fine and expects to be home shortly."
Blatter has been told to "stay cool and relax for a few days", according to his spokesman Klaus Stoehlker.
Both Blatter and Uefa President Michel Platini were given 90-day bans in the wake of a Swiss criminal case investigating financial misconduct at Fifa.
It centres on whether Blatter misused Fifa money by making a 2m euros (£1.35m) payment to Frenchman Platini for consultation work. They both deny any wrongdoing.
Seven candidates will stand in Fifa's presidential election to succeed Blatter on 26 February.