cause for concern

:  a reason for an action or condition :  motive

:  something that brings about an effect or a result

:  a person or thing that is the occasion of an action or state

:  to serve as a cause or occasion of

:  to compel by command, authority, or force

:  to relate to :  be about

:  to bear on

:  to have an influence on :  involve

:  marked interest or regard usually arising through a personal tie or relationship

:  an uneasy state of blended interest, uncertainty, and apprehension

:  something that relates or belongs to one :  affair