run/take its course

run its course

To progress along something's natural course and conclude at its normal pace. (Used especially in reference to illness and disease.) Unfortunately, there's no cure for this kind of infection; you just have to let it take its course. Rather than go through the medical procedures and take all the different medications, I've decided to just let the disease take its course, and see what happens.
See also: course, run

run its course

[for something] to continue through its cycle of existence, especially a disease. Sorry. There is no medicine for it. It will just have to run its course.
See also: course, run

take its course

to continue along its way; [for a disease] to progress the way it normally progresses until it is cured naturally. There is really no good medicine for this. This disease simply has to take its course.
See also: course, take

run its course

Proceed to its logical or natural conclusion, as in The doctor said the cold would probably run its course within a week. This idiom employs course in the sense of "an onward movement in a particular path." [Second half of 1500s]
See also: course, run

run its course

COMMON If something runs its course, it develops gradually and comes to a natural end. If you allow such behaviour to run its course without reacting, eventually the behaviour will disappear on its own. Is this a sign that the recession has run its course?
See also: course, run

take its course

If something takes its course, it develops in it own way without interference from others, and has its own result. As a political party, they prefer to let the market take its course.
See also: course, take

run/take its ˈcourse

(of a series of events, an illness, etc.) develop in the natural or usual way without being changed or stopped: The doctors agreed to let the illness run its course, rather than prescribe drugs which had little chance of success.We must allow justice to take its course.
See also: course, run, take