Alexithymia

A personality construct of condition marked by difficulty identifying, describing and distinguishing feelings from bodily sensations; with limited imagination and an overdependence on externalization and reasoning (e.g. begin aware of sensations rather than sentiments).

Reference:
Nemiah, J.C. & Sifneos, P.E. (1970). Psychosomatic illness: A problem in communication. Psychotherapy and Psychosomatics, 18, 154.160.