Jackson said over the last three years, he found it increasingly difficult to perform routine tasks, and getting around became more of a challenge.
"For a while, I resisted interrupting my work to visit a doctor," Jackson said in a news release. "But as my daily physical struggles intensified I could no longer ignore the symptoms, so I acquiesced."
Jackson said after a battery of tests, his physicians identified the issue as Parkinson's.
"Recognition of the effects of this disease on me has been painful, and I have been slow to grasp the gravity of it," he said. "For me, a Parkinson's diagnosis is not a stop sign but rather a signal that I must make lifestyle changes and dedicate myself to physical therapy in hopes of slowing the disease's progression."
NEW: Rev. Jesse Jackson says he has been diagnosed with Parkinson's disease, pledges to continue his work: "I steadfastly affirm that I would rather wear out than rust out." pic.twitter.com/mH3f0UOfhi— ABC News (@ABC) November 17, 2017