neurasthenia

A psychological disorder characterized by chronic fatigue, weakness, and generalized aches and pains, formerly thought to result from exhaustion of the nervous system.

In medicine, nervous debility; nervous exhaustion.

A condition of nervous debility supposed to be dependent upon impairment in the functions of the spinal cord.

An ill-defined medical condition characterized by lassitude, fatigue, headache, and irritability, associated chiefly with emotional disturbance.

nervous breakdown (not in technical use)