The German Tonkünstlerverband, concerned at rising rates of burnout among performing and teaching musicians, has commissioned a study from a psychiatrist, Dr. Jürgen Brunner, to examine the phenomenon and recommend forms of therapy. You can read his essay here in German. It sets out the condition in general terms, without case histories, but many of the symptoms will be widely familiar.
Anecdotally, we have become increasingly aware of rising dropout rates in the musical professions, as well as incidents of self-harm and suicide. There seems to be no single immediate cause. The German initiative is welcome for opening the field of study.