Trouble (known as Frustration in the UK and Kimble in Finland) is a board game in which players compete to be the first to send four pieces all the way around a board. Pieces are moved according to the roll of a die using a contained device called a "Pop-O-Matic". Trouble was developed by the Kohner Brothers and initially manufactured by Irwin Toy Ltd., later by Milton Bradley (now part of Hasbro). The game was launched in America in 1965. The classic version is now marketed by Winning Moves Games USA. The gameplay, board, and concept is derivative of the British board game Ludo, itself based on the Indian board game pachisi.

A similar game called Headache was also produced by the Milton Bradley Company; besides a different track layout, its pawns are conical, in contrast to the cylindrical pieces used in Trouble.