The 83-year-old Kentucky senator experienced the symptoms over the weekend and checked himself into a local hospital Monday night for evaluation, said spokesman David Popp.
"His prognosis is positive, and he is grateful for the excellent care he is receiving," his spokesman said in a statement. "He is in regular contact with his staff and looks forward to returning to Senate business."
McConnell, an 83-year-old Kentucky senator, announced last February that he won't seek reelection this year, ending a decades-long tenure as a power broker who championed conservative causes but ultimately ceded ground to the GOP populism of President Donald Trump.
He's the longest-serving Senate party leader.
McConnell, first elected in 1984, intends to serve out the remainder of his term, which ends in January 2027. The Kentuckian has dealt with a series of medical episodes in recent years.
In 2023, he took a fall at a hotel and underwent physical therapy for a concussion, missing several weeks of work. The following year, he fell and sprained his wrist while walking out of a GOP luncheon.
McConnell had polio in his early childhood, and he has long acknowledged some difficulty as an adult in walking and climbing stairs. In addition to his 2023 fall, he also tripped and fell in 2019 at his home in Kentucky, causing a shoulder fracture that required surgery.