The torture of the Hungry Ghost Realm is not so much the pain of not finding what he wants; rather it is the insatiable hunger itself which causes pain.
Trungpa locates the defining suffering of the Hungry Ghost Realm in the structural quality of craving itself rather than in any particular failure of satisfaction, establishing the phenomenological ground for all subsequent depth-psychological deployments of the term.
, Cutting Through Spiritual Materialism, 1973thesis