Grasp the nettle
Definition 1 of 1
Pro Tip 1/3Action Needed
The phrase suggests urgent action is necessary to solve a difficult issue. 
With the deadline tomorrow, we need to grasp the nettle and finish the project.
Pro Tip 2/3Unpleasant Choices
Using this expression implies that the speaker is ready to handle an unpleasant situation. 
Even though firing an employee is hard, sometimes you have to grasp the nettle.
Pro Tip 3/3Bravery Connotation
It often infers that the speaker is acting brave by confronting a problem. 
She grasped the nettle by speaking up against the unfair rules.