Neurasthenia is a degeneration of cerebration ability resulted from psychic uapprehensiveness or trauma, long-term mental work load and insufficient sleep. The key feature of neurasthenia is mental excitement, aneuria and physical fatigue with any kind of soma discomfortableness and dyssomnia but has no foundation of structure disease. Neurasthenia is seen more commonly in intellectual workers.

The onset of the disease is related to excessive contemplation, disorder of overtiredness and easefulness, innate weakness of the body or deuteropathic infirmity, Insufficiency of vital energy and blood in heart and spleen or asthenic yin causing excessive pyrexia, failure of the heart, kidney integrating as well as stagnation of Qi due to depression of the liver and internal stagnation of phlegm even blood stasis obstructing collaterals due to chronic disease are frequently seen in clinic. Make sure to discriminate deficiency and excess and recognize the location.