The shaggy-haired 34-year-old, whose regular partner in central defence Gerard Pique has not played since hurting his foot two weeks ago, was taken to a local hospital for checks before flying back to the Catalan capital and spending the night under observation in a clinic.
"Good day! The sun always comes out again... thanks for all your messages! A big hug," he wrote on his Twitter feed.
Barca will sorely miss Puyol's experience and inspirational do-or-die attitude on Sunday.