trouble spot

:  the quality or state of being troubled especially mentally

:  public unrest or disturbance

:  an instance of trouble

:  to agitate mentally or spiritually :  worry, disturb

:  to put to exertion or inconvenience

:  to produce physical disorder in :  afflict

:  a taint on character or reputation :  fault

:  a small area visibly different (as in color, finish, or material) from the surrounding area

:  an area marred or marked (as by dirt)

:  to stain the character or reputation of :  disgrace

:  to mark in or with a spot :  stain

:  to locate or identify by a spot

:  being, originating, or done on the spot or in or for a particular spot

:  available for immediate delivery after sale

:  paid out upon delivery