urge to

n (psychology) an urge to accept or approach a situation or an object

an urge to do or say something that might be better left undone or unsaid n

To urge to abstain or refrain

n difficulty in defecating (usually as a consequence of long continued voluntary suppression of the urge to defecate)

A crush on a FB friend is characterized by the unexplainable urge to revisit the friend's Photos tab repeatedly and checking to see if other friends have written new messages on their Wall