bring to a head

bring to a head idiom
Cause to reach a turning point or crisis. For example, Management's newest policy has brought matters to a head. The related phrase come to a head means “to reach a crisis,” as in With the last break-in, the question of security came to a head. These phrases allude to the medical sense of head, the tip of an abscess that is about to burst. [Mid-1500s]

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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