deficiency of vital energy refers to weakness, pale faced, shortness of breath, weakness of limbs, dizziness, sweating when moving,faint low voice, etc.
deficiency of vital energy is caused by the loss of qi, which leads to the decline of the functions of promoting, warming, defending, fixing and qi transformation of qi, which leads to the decline of some functions of the body, and Decreased disease resistance. Congenital insufficiency, acquired dystrophy, old age and weakness, malnutrition, chronic illness, after major surgery and excessive fatigue can all lead to deficiency of vital energy.
气虚，指身体虚弱、面色苍白、呼吸短促、四肢乏力、头晕、动则汗出、语声低微等。气虚是因虚损进而导致气的推动、温煦、防御、固摄和气化功能的减退，从而导致机体的某些功能活动低下或衰退，抗病能力下降。先天不足、后天失养、年老虚弱、营养不良、久病未愈、大手术后及疲劳过度等都会导致气虚出现
