The doctor told his patient that he had a very contagious disease and that it was important to tell his family. When the man refused, the doctor didn’t know whether he should call his patient’s family and tell them. He was between a rock and a hard place.
Synonym: between the devil and the deep blue sea Compare to: in a bind/fix/jam; over a barrel; behind the eight ball Between a rock and a hard place is more dramatic than in a bind and would be used when the problem of choice has no apparent or easy solution.