where the shoe [pinch]

used to refer to where the all the trouble comes from or where things get difficult

The origin of the idiom "where the shoe pinches" is rooted in the common experience of discomfort caused by ill-fitting or tight shoes. It reflects the idea that when a shoe pinches, it creates a specific point of discomfort. Over time, this expression evolved to symbolize situations where individuals encounter difficulties or problems at specific points or areas, just as a shoe might cause pain in a particular spot.

When she talked about her struggles with time management, she pointed out where the shoe pinches – meeting deadlines for her assignments.
In the project discussion, team members were encouraged to share their concerns and explain where the shoe pinches in the current process.
The employees voiced their frustrations about workplace inefficiencies and pointed out where the shoe pinches in their daily tasks.
John could finally discuss his financial challenges and explain where the shoe pinches – his mounting credit card debt.
During the therapy session, he described his emotional struggles and revealed where the shoe pinches in his personal life.