Turan has gastritis according to the official Barcelona Twitter account but his illness is not severe.
Turan missed the 2-1 defeat against Valencia due to suspension but he will be eligible to play tomorrow if fit.
Barcelona are on a bad run after losing their last three successive games against Real Madrid, Atletico Madrid and Valencia. Barca have been knocked out of the Champions League and have seen their 10 point lead at the top of the table reduced to being leaders based on goal difference.
Turan has two goals and four assists for Barca since joining from Atletico Madrid on a five-year deal from Atletico Madrid over the summer.
The Turkish international midfielder has yet to comment on the severity of his illness but did post a recent Instagram post underlining that Barcelona will get back on track.