Low Immunity (Weak Wei Qi)
Overview
Weak Wei Qi denotes a constitutional state of deficient defensive qi failing to secure the exterior, characterized by recurrent common cold, spontaneous sweating, aversion to wind, and fatigue. It commonly arises from congenital insufficiency, chronic illness consuming qi, overexertion, or aging, leading to lung-spleen qi deficiency and inability to defend the exterior. Clinically there is susceptibility to external contraction, sweating with wind aversion, pale complexion, shortness of breath and laziness to speak, pale tongue with thin white coating, and a floating weak pulse. This condition falls under 'consumption' and 'spontaneous sweating' in TCM, with the disease location in the lung-wei and involving the spleen and kidney.
Pattern differentiation (clinical patterns)
Lung-Spleen Qi Deficiency
Recurrent common cold, shortness of breath and fatigue, spontaneous sweating with aversion to wind, sallow complexion, poor appetite and loose stools, pale tongue with thin white coating, and a weak pulse.
Tonify qi and secure the exterior; strengthen the spleen and supplement the lung.
Disharmony of Ying and Wei
Frequent spontaneous sweating, aversion to wind, generalized aching, alternating chills and fever, pale red tongue with thin white coating, and a moderate pulse.
Harmonize ying and wei; secure the exterior and stop sweating.
Spleen-Kidney Yang Deficiency
Aversion to cold with cold limbs, soreness and weakness of the lower back and knees, susceptibility to wind-cold, spontaneous sweating, clear and profuse urine, pale swollen tongue with white coating, and a deep slow pulse.
Warm and supplement the spleen and kidney; secure and protect wei yang.
Connections
Daily care & prevention
Avoid wind-cold and adapt to temperature changes, keeping the neck and back warm. Diet should tonify qi and secure the exterior; regular intake of Huang Qi, Shan Yao, Da Zao, and millet is advised, while raw and cold foods should be avoided. Maintain regular rest, avoid overwork, and exercise moderately with Ba Duan Jin or Tai Ji Quan to strengthen the constitution. For spontaneous sweating, change clothes promptly and avoid wind after sweating. Moxibustion at Zusanli and Qihai can warm and supplement wei yang.
When to seek medical care
Persistent high fever, cough with dyspnea, clouded spirit and delirium, or profuse sweating with cold limbs and faint pulse suggest pathogen sinking with collapse of healthy qi or sudden collapse of yang qi; seek immediate medical attention. Recurrent colds with weight loss, low-grade fever, or lymphadenopathy warrant investigation for other diseases.