From Discovered

A Trouble is that thing that always makes your life more complicated, such as a personal weakness, or a recurring enemy, or an important obligation. Obviously, your trouble aspect is supposed to cause problems—and thereby make your character’s life more interesting and get you fate points—so it’s okay if this aspect is a little more one-dimensional. It's still better to be double-edged.

Examples: Làidir Aonar want me dead; Attack now, ask questions later; Gotta look out for my little brother; The sauce.