Unpleasant experiences include backaches, moments of nausea, moments of nervousness, phantom pains, and so on. What does their unpleasantness consist in? The unpleasantness of an experience has been thought to consist in: (1) its representing bodily damage; (2) its inclining the subject to fight its continuation; (3) the subject's disliking it; (4) features intrinsic to it. I offer compelling objections to (1) and (2) and less compelling objections to (3). I defend (4) against five challenging objections and offer two reasons (...) to believe it. Hence, I advocate "Intrinsic Nature," the idea that unpleasantness is intrinsic to unpleasant experiences. (shrink)