A Word on Wednesday: Writer's Block

This noun with one, and only one, definition is a legitimate dictionary entry; its origin traceable to 1945. source

"a usually temporary condition in which a writer finds it impossible to precede with the writing of a novel, play, or other work." 

Take comfort; it is usually temporary. 

However, beware of Writer's Block's cousin: "Blank Page Syndrome"

These ails are apt to keep charlatans, ahem writing coaches, in business.