Knee Pain: When Your Knees Speak Up on the Stairs｜膝关节痛：上下楼梯时，膝盖先"说话"了

May 17

Going upstairs, your knee grinds like there's sand inside; going down, it feels weak and aches dully. Squatting down is easy — getting back up isn't, without something to grab. Most telling is the "buckling knee" — mid-stride, the knee suddenly gives way and you nearly kneel. Once knees act up, your world shrinks fast.

What Western Medicine Says

In middle-aged and older adults, the most common cause is osteoarthritis: articular cartilage gradually wears thin, bone rubs on bone, synovial inflammation and surrounding muscle wasting set in, and pain grows. Weight is a major driver — every extra kilogram adds roughly 4 kilograms of load on the knee. Standard care is stepwise: weight loss and quadriceps strengthening are the foundation, with the strongest evidence behind them; NSAIDs are for short-term pain relief; joint injections (hyaluronic acid, platelet-rich plasma) work differently for different people; joint replacement is considered only for severe deformity unresponsive to conservative care. In younger people, knee pain more often means patellofemoral syndrome, meniscus injury, or sports overuse — get a clear diagnosis first.

What TCM Sees: Identify Your Pattern First

TCM classifies knee pain under "bi syndrome," "bone bi," and "crane's-knee wind," holding that "the liver governs the sinews, the kidney governs the bones," and the knee is the house of sinews. Three common patterns in practice:

Wind-cold-damp obstruction: cold, heavy knee pain with limited bending, worse on rainy days, better with heat; treatment focuses on dispelling wind, scattering cold, and removing dampness to open the channels;
Qi stagnation and blood stasis: stabbing, fixed knee pain, worse on stairs and after prolonged walking or standing, often with a history of injury or overuse; treatment focuses on invigorating blood and opening the channels to stop pain;
Liver and kidney deficiency: sore, weak knees with a dull lingering ache, worse with exertion, with sore lower back and knees and difficult gait — common in age-related degeneration; treatment focuses on tonifying liver and kidney to strengthen sinews and bones.

Degenerative knee problems are usually "deficiency at the root, excess on the surface": depleted liver and kidney failing to nourish sinews and bones underneath, wind-cold-damp or stasis adding blockage on top.

Typical Presentations

Morning knee stiffness that loosens after ten-plus minutes of movement, worse on rainy days — usually wind-cold-damp obstruction
Aching, weak knees on stairs, with the first step after sitting the worst — usually qi stagnation and blood stasis with liver-kidney deficiency
A dull knee ache with no strength in it; fine on flat ground, sore on long walks — usually liver and kidney deficiency
Swollen knee, warm to the touch, with a grinding sensation on bending — usually damp-heat obstruction or significant synovial inflammation

How Acupuncture Helps

Acupuncture follows pattern-based point selection: wind-cold-damp patterns focus on warming the channels and scattering cold, often with moxibustion to warm the joint; qi-stagnation patterns invigorate blood and release the tight muscles and fascia around the knee; liver-kidney-deficiency patterns tonify systemically to improve local qi-blood nourishment of the joint. Acupuncture may also help restore quadriceps strength and knee stability through neuromuscular regulation. Systematic reviews suggest acupuncture may improve pain and function scores in knee osteoarthritis, but studies vary widely in treatment courses and control designs, so the evidence quality is limited — and it cannot reverse already-worn cartilage. Severe deformity, persistent swelling with warmth, or marked night/rest pain warrant imaging first to rule out cases needing surgical intervention.

5 Things You Can Do Every Day

Control your weight — the best-value "treatment" for knees: every kilogram lost spares the knee about 4 kilograms of load;
Do straight-leg raises and wall sits daily to strengthen the quadriceps — a muscular knee brace;
Cut back on knee-punishing moves like stair climbing, hiking, and deep squats; switch to low-impact swimming or cycling;
Knees fear both cold and wrong heat: ice acutely swollen knees, warm chronically cold-aching ones — don't mix them up;
Wear cushioned shoes; avoid long walks in high heels or completely flat soles.

Time to See a Doctor If…

The knee stays swollen and warm; buckling happens often and affects walking; night/rest pain is marked; or deformity worsens and 6+ weeks of conservative care hasn't helped. Rule out the cases needing imaging first, then pursue conservative care with confidence.

Book a consultation — let's find the right plan for you.

iHealth Acupuncture Wellness Center | Santa Clara · Menlo Park

上楼时膝盖里像有沙子在磨，下楼时膝盖发软、隐隐作痛；蹲下去容易、站起来难，得扶着东西借力，膝盖里还"咔"地响一声；最典型的是"打软腿"——走着走着膝盖突然一软，差点跪下去。膝盖一出问题，活动半径立刻缩水。

西医怎么说

中老年膝关节痛最常见的原因是骨关节炎：关节软骨逐渐磨损变薄，软骨下的骨头相互摩擦，伴随滑膜炎症和关节周围肌肉萎缩，疼痛就越来越明显。体重是重要推手——每多 1 公斤体重，膝关节要多承受约 4 公斤的压力，所以减重是性价比最高的干预。常规处理分阶梯：基础治疗是减重和股四头肌锻炼，这是证据最充分的一环，很多轻中度患者光靠这两项就能明显好转；药物以非甾体抗炎药短期缓解疼痛为主，不建议长期依赖；关节腔注射（玻璃酸钠、富血小板血浆）效果因人而异；只有关节严重变形、保守治疗无效时，才考虑关节置换。年轻人膝痛则多见髌股关节综合征、半月板损伤或运动劳损，需要先明确诊断。

中医怎么看：先辨证

中医把膝关节痛归为"痹证""骨痹""鹤膝风"范畴，认为"肝主筋、肾主骨"，膝为筋之府。临床上常见三种证型：

风寒湿痹：膝关节冷痛沉重、屈伸不利，阴雨天加重，热敷舒服，治法以祛风散寒、除湿通络为主；
气滞血瘀：膝部刺痛、痛处固定，上下楼梯痛甚，久行久立后加重，多有外伤或劳损史，舌质紫暗或有瘀斑，治法以活血化瘀、通络止痛为主；
肝肾亏虚：膝关节酸软无力、隐隐作痛，劳累后加重，伴腰膝酸软、步履艰难，常见于中老年退变，治法以补益肝肾、强筋健骨为主。

膝关节退变多是"本虚标实"：肝肾不足、筋骨失养是底子，风寒湿或瘀血是加重的"堵"。所以中老年膝痛调理往往是"两条腿走路"：通眼前的堵、补底子的虚，单做一头容易反复。

典型表现

早上起床膝盖僵硬，活动十几分钟才松快，阴雨天更重——多属风寒湿痹
上下楼梯时膝盖里酸痛发软，久坐站起时第一步最疼——多属气滞血瘀兼肝肾亏虚
膝盖隐隐作痛、使不上劲，走平路还好、走远了就酸——多属肝肾亏虚
膝盖肿胀、摸上去发热，屈伸时有摩擦感，活动后加重——多属湿热痹阻或滑膜炎症较重

针灸能帮什么

针灸按证型配穴：风寒湿痹重在温经散寒、配合艾灸温通关节；气滞血瘀以活血通络、松解膝周紧张的肌肉筋膜为主；肝肾亏虚则整体调补、改善关节局部的气血濡养。针灸还能通过调节神经肌肉功能，帮助恢复股四头肌的力量和膝关节的稳定性。系统综述提示针灸可能改善膝骨关节炎的疼痛和功能评分，但研究在疗程、对照设置上差异较大，证据质量有限，不能逆转已经磨损的软骨。如果膝关节严重变形、持续肿胀发热、或夜间静息痛明显，需先做影像学评估，排除需要手术干预的情况。

日常能做的 5 件事

控制体重——这是对膝盖最划算的"治疗"，体重每减 1 公斤，膝盖少扛约 4 公斤；
每天做直腿抬高和靠墙静蹲，强化股四头肌，给膝盖装上"肌肉护膝"；
减少爬楼梯、爬山、深蹲等"伤膝"动作，改用游泳、骑车等低冲击运动；
膝盖怕冷也怕过度热敷：急性肿胀期冷敷，慢性冷痛期热敷，别用反了；
选择有缓冲的鞋子，避免长时间穿高跟鞋或完全平底的鞋走远路——鞋是膝盖的"第一层减震"。

该来看医生了，如果……

膝关节持续肿胀、发热；"打软腿"频繁发生、影响走路；夜间静息痛明显；或膝关节变形加重、保守调理 6 周以上无效。先把需要影像学评估的情况排除，再安心做保守调理——膝盖要用几十年，值得认真对待。

欢迎预约咨询，我们一起找到适合你的调理方案。