run a fever

run a fever

to have a high body temperature caused by an illness He developed a very bad ear infection and ran a fever for a couple of days.
See also: fever, run

run a fever

Also, run a temperature. Suffer from a body temperature higher than normal, as in She was running a fever so I kept her home from school. These idioms use run in the sense of "cause to move," in this case upward. [Early 1900s]
See also: fever, run