A medical team was examining Saudi King Salman over joint pain and "high temperature", state media said on Sunday.
This is the second time the monarch has been examined in less than a month.
The Royal Court of Saudi Arabia said that the tests will take place at a clinic at the Al-Salam Palace in the Red Sea port city of Jeddah.
"The treating medical team decided to conduct some tests to diagnose the health condition and to ensure his health," they said.
The statement did not provide further details.
Who is Saudi Arabia's King Salman?
Before becoming Saudi Arabia's monarch, King Salman served as the governor of the central Riyadh region and as Defense Minister. Now 88 years old, he has been on the throne since 2015.
His son, Mohammed bin Salman, was named crown prince in 2017 and is generally seen as the country's de facto ruler.
At the time, the Kingdom dismissed speculation that the monarch was preparing to step down in favor of his son.
King Salman underwent surgery to remove his gallbladder in 2020.
In March 2022, he was hospitalized to change the battery of his pacemaker.
Since stepping into the limelight, the crown prince has implemented social and economic reforms in an apparent push to make Saudi Arabia less reliant on oil in the future.
Saudi Arabia has undertaken major construction projects, including building the desert city of Neomunder Mohammed bin Salman, with the goal of increasing tourism to the kingdom.
The prince has also overseen a crackdown on dissent.