Asthenia syndrome   Asthenia syndrome is produced by a deficiency of vital energy (qi) and essence, lowered resistance and impaired functioning of the body. It is commonly seen in conditions of general debility and after long-term illness. The usual presentation is with pallor, listlessness, shortness of breath, palpitation, insomnia and poor appetite.		xu zheng 虛証   虛証是由於正氣不足，機體抗病能力低下，生理功能減退所產生的証候。表現為面色蒼白、精神疲憊、氣短音低、心悸失眠、飲食減少、舌體胖嫩、脈虛無力等。