[bring] {sth} to a head

to worsen a situation to a point that it requires immediate action

The idiom "bring something to a head" likely derives from the idea of a physical ailment or issue reaching a critical or severe stage. It is used metaphorically to describe the act of taking actions or making decisions to resolve or confront a problem, dispute, or situation that has been escalating or festering over time.

After years of tension in the workplace, the CEO decided to bring the ongoing conflicts to a head by holding a company-wide meeting to address the issues.
The couple's relationship had been deteriorating for some time, and their recent argument finally brought their problems to a head, leading to a breakup.
The political unrest in the region reached a breaking point, and the government's actions further brought the situation to a head, resulting in widespread protests.
The financial crisis forced the company's board of directors to bring the discussion about layoffs to a head, leading to tough decisions.
The negotiations had stalled, but the impending deadline for the trade agreement forced both parties to bring the matter to a head and come to a resolution.