What Causes Knee Pain Without Injury?

Non-injury knee pain typically stems from overuse, arthritis, or biomechanical issues affecting joint function. Osteoarthritis affects over 32 million Americans and commonly causes gradual knee pain without specific trauma. Patellofemoral pain syndrome occurs when the kneecap doesn't track properly, often from muscle imbalances or tight hip flexors. Bursitis develops when fluid-filled sacs around the knee become inflamed from repetitive motions. Other causes include baker's cysts, which affect 5-38% of adults, tendinitis from overuse, and referred pain from hip or lower back problems. Age-related cartilage wear, excess weight placing additional stress on joints, and poor posture can all contribute to knee discomfort without a clear injury event.

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