"The doctors have determined that this was an isolated incident and that after a few weeks my recovery will be complete. I will be ready to rock on the Family Values Tour this summer," the 35-year-old Davis, who was released from a London hospital after four days of treatment, said Tuesday.
On Korn's Web site Monday, Davis said he was diagnosed last weekend with an infection that prevents blood from clotting normally because of a low number of platelets, cells produced by bone marrow. It was brought on by an allergic reaction to medication, he said.
"I started getting these weird bruises all over my body about two weeks ago," Davis said.
He said he was perilously close to death: "If I continued to headbang on stage, I could have had a brain hemorrhage and dropped dead on the spot."
The overseas part of the tour was to end June 27 in Budapest.
The band is headlining the fourth edition of the Family Values Tour in support of their latest album, "See You On the Other Side." The 30-city North American leg is scheduled to start in Virginia Beach, Va., on July 27.
Korn won a Grammy in 2003 for best metal performance for the song "Here to Stay" from their album "Untouchables."