Peripheral Neuropathy (Blood Bi Syndrome)
Overview
Blood Bi (xue bi) is characterized by numbness, pain, and weakness of the limbs, corresponding to peripheral neuropathy in Western medicine. The disease name first appears in the Jin Gui Yao Lue (Essential Prescriptions of the Golden Cabinet). It commonly arises from insufficient ying-wei and deficiency of qi and blood, complicated by contraction of wind-cold-dampness pathogens, leading to obstruction of the meridians and loss of nourishment to the skin and muscles. Clinically, it is often seen in patients with diabetes (xiao ke), drug-induced toxicity, or chronic debility. The disease is located in the skin, muscles, and meridians, and is closely related to the liver, spleen, and kidney. The basic pathogenesis is obstruction of qi and blood, or failure to nourish the skin and muscles. Pattern differentiation should distinguish excess and deficiency: excess patterns are mainly wind-cold-dampness obstruction and phlegm-stasis blocking the collaterals; deficiency patterns are mainly qi-blood deficiency and liver-kidney depletion. The general treatment principle is to unblock the meridians and activate collaterals, and to supplement qi and nourish blood. Adjunctive therapies such as acupuncture and tuina can enhance efficacy.
Pattern differentiation (clinical patterns)
Qi Deficiency with Blood Stasis
Numbness and insensitivity of the limbs, stabbing pain that worsens at night, fatigue and lack of strength, shortness of breath and reluctance to speak, dim complexion, pale purple tongue or with ecchymosis, and a fine choppy pulse.
Supplement qi and invigorate blood; unblock the collaterals and stop pain.
Cold-Dampness Obstructing the Collaterals
Cold, heavy, and painful limbs, aggravated by cold and relieved by warmth, numbness and insensitivity, difficulty in flexion and extension, pale tongue with white greasy coating, and a deep tight pulse.
Warm the meridians and disperse cold; eliminate dampness and unblock the collaterals.
Liver-Kidney Depletion
Numbness and weakness of the limbs, soreness and weakness of the lower back and knees, dizziness and tinnitus, five-center heat, night sweats, red tongue with little coating, and a fine rapid pulse.
Nourish and supplement the liver and kidney; enrich and nourish the sinews and vessels.
Connections
Daily care & prevention
Keep the limbs warm and avoid exposure to wind-cold-dampness. Engage in moderate exercise of the affected limbs, perform meridian massage or gentle stretching to promote qi and blood circulation. Diet should be warm and supplementing; consume red dates, longan, Chinese yam, and lean meat to supplement qi and blood; avoid raw, cold, greasy foods. Maintain emotional calm and avoid excessive worry or anger. Diabetic patients should strictly control blood sugar. Avoid prolonged static postures and prevent compression of the limbs. Soaking feet in warm water each evening with foot massage is beneficial.
When to seek medical care
Sudden worsening or expansion of numbness with weakness and difficulty walking may indicate disease progression. Muscle atrophy, paralysis, or incontinence of urine and stool suggests a severe condition. Severe pain that worsens at night and disturbs sleep warrants prompt medical attention. Fever, rash, or red, swollen, hot, painful joints may indicate infection or an immune disorder. Diabetic patients with foot ulcers or gangrene require immediate specialized care.