Acute Back Spasm
Overview
Acute back spasm falls under the categories of 'bi syndrome' (痹证) and 'tendon injury' (筋伤) in TCM. It commonly arises from sudden exposure to wind-cold-dampness, or from lifting strain, sudden twisting, or improper posture, leading to stagnation of qi and blood in the back channels and vessels, causing acute contracture and pain of the sinews. The disease involves the Du Mai, the Foot Taiyang Bladder channel, and the Foot Shaoyang Gallbladder channel. Clinically it presents with sudden tightness and pain in the back, restricted movement, and board-like rigidity of local muscles, often triggered by cold exposure or fatigue. The key pathogenesis is 'obstruction causing pain' (不通则痛); however, 'malnourishment causing pain' (不荣则痛) from qi-blood deficiency failing to nourish the sinews may also occur, though the acute phase is dominated by excess pathogens. Treatment follows the principle of treating the branch in acute conditions, focusing on dispelling pathogens, unblocking the collaterals, soothing the sinews, and relieving spasm; external therapies such as acupuncture, tuina, and cupping can provide rapid relief.
Pattern differentiation (clinical patterns)
Wind-Cold-Dampness Bi Syndrome
Tightness and pain in the back, aggravated by cold and relieved by warmth, difficulty turning the trunk, board-like rigidity of local muscles, possibly with aversion to cold and absence of sweating, pale tongue with white greasy coating, and a floating tight or wiry tight pulse.
Dispel wind, scatter cold, eliminate dampness, unblock the collaterals, soothe the sinews, and relieve spasm.
Qi Stagnation and Blood Stasis Syndrome
Stabbing pain in the back at a fixed location that is tender to pressure, restricted movement, possible local swelling or ecchymosis, often with a history of sprain or sudden twisting, dark tongue or with petechiae, and a wiry choppy pulse.
Move qi, invigorate blood, transform stasis, unblock the collaterals, soothe the sinews, and stop pain.
Liver and Kidney Deficiency Syndrome
Dull aching pain in the back that worsens with fatigue and eases with rest, soreness and weakness of the lower back and knees, dizziness and tinnitus, pale tongue with thin coating, and a deep thin weak pulse.
Tonify the liver and kidney, strengthen the sinews and bones, and nourish blood to enrich the sinews.
Connections
Daily care & prevention
During the acute phase, rest on a firm mattress and avoid bearing heavy loads or sudden twisting. Keep the local area warm and avoid exposure to wind and cold. Apply local heat compresses for 15-20 minutes, 2-3 times daily, to promote qi and blood circulation. After pain subsides, gradually perform back stretching and core muscle exercises; avoid prolonged sitting or standing and sudden bending to lift heavy objects. Eat warm, easily digestible foods and avoid raw, cold, and cooling items. For recurrent episodes, tonify the liver and kidney and strengthen the sinews and bones to prevent relapse.
When to seek medical care
If back pain is accompanied by fever and chills, or radiates to the chest and abdomen with chest tightness and shortness of breath, cardiopulmonary disorders should be suspected. If there is numbness and weakness of the lower limbs, incontinence of urine and stool, or saddle-area sensory disturbance, it suggests cauda equina compression, which is an emergency. Progressive night rest pain with weight loss warrants exclusion of bone metastasis from tumor. In these situations, seek immediate medical attention and do not treat merely as muscle spasm.