Perhaps one of the most famous spiritual figures at the current time, Tolle spent time with a teacher by the name of Barry Long following his own awakening experience. And Barry is of course the teacher whose teaching I followed.
Tolle describes his own awakening experience in his books and elsewhere as the point at which the depression he'd suffered with for so many years suddenly came to an end. Following this, Tolle sought to understand what had happened to him and attended Barry's meetings in London. This was prior to Barry becoming well known.
In those days, Barry used to refer to the emotion as the Unhappy body and/or the Emotion body, later dropping the word 'body' referring to it simply as emotion. (And this was the teaching I came to know and live.) Barry would describe the process as requiring that one hold onto the emotion consciously so as to dissolve it.
I found Barry in the late 80s early 90s, by which time Tolle might have left Barry's teaching. Tolle later published the above book for which he became famous and adapted the term for the latent emotion to his now familiar 'Pain body', though of course still describing moving consciously into it so as to become free of it. It is indeed the same teaching.