Joint List MK Ahmad Tibi was briefly hospitalized Friday and diagnosed with kidney stones.
He was taken to Hadassah Hospital Mount Scopus after feeling unwell and doctors made the diagnosis after running a series of tests.
Tibi was sent home to rest and will have to return to the hospital early next week for additional monitoring and tests.
Ra’am chairman Mansour Abbas was hospitalized and forced to undergo surgery for the same condition in April while he was being courted by Likud chair Benjamin Netanyahu and Yesh Atid chair Yair Lapid, who were both seeking to form a government.
Tibi, 62, is one of the longest-serving Knesset members, entering parliament in 1999. He now heads the two-member Ta’al faction of the Joint List, which has shown greater willingness to work with the new coalition than the Balad and Hadash slates.