There are many types of dilemma:
Double bind: conflicting requirements ensure that the victim will automatically be wrong.
Ethical dilemma: a choice between moral imperatives.
Extortion: the choice between paying the extortionist and suffering an unpleasant action.
Fairness dilemmas: when groups are faced with making decisions about how to share their resources, rewards, or payoffs
Hobson's choice: a choice between something and nothing; "take it or leave it".
Morton's fork: choices yield equivalent, often undesirable, results.
Prisoner's dilemma: An inability to coordinate makes cooperation difficult and defection tempting.
Samaritan's dilemma: the choice between providing charity, improving another's condition, and withholding it, preventing them from becoming dependent.
Sophie's choice: a choice between two persons or things that will result in the death or destruction of the person or thing not chosen.
Zugzwang: One must move and incur harm when one would prefer to make no move (esp. in chess).
Dilemmas may sometimes be expressed as:
"Between Scylla and Charybdis"
"Lesser of two evils"
"Between a rock and a hard place", since both objects or metaphorical choices are rough.
"Between the devil and the deep blue sea"