Joseph LeDoux ("Rethinking the Emotional Brain", Neuron 73, 2012, p. 653) assumes that emotional feelings are representations of the state of the body. According to his definition, feelings "occur in humans when consciousness (1) detects that a survival circuit is active or witnesses the existence of a global organismic state initiated by the activation of a survival circuit in the presence of particular kind of challenge or opportunity and (2) appraises and labels this state".
This conceptualization possibly has the philosophical mistake of confusing presentational and representational states. Presentational states are lived experiences (e.g., feeling pain) related to an intentional object or process, while representational states are cognitive mappings that may not be accompained by the lived experience (for instance, I can map in my body where a felt pain comes from, even when I am not feeling it). Therefore, feelings and affective states in general should be conceived as presentational states. They do not give to the conscious mind information about the origin of the signals or about the mechanisms that process the signals that elicit them; for instance, when I feel toothache, my conscious mind does not represent the tissue lesion that causes the pain.