M99.8: Other biomechanical lesions

Biomechanical lesions, classified under ICD-10 code M99.8, refer to abnormalities or injuries resulting from alterations in the normal operation or structure of the musculoskeletal system. These conditions occur due to forces imposed on the body during regular activities such as walking, sitting, or running, or during strenuous activities like heavy lifting or high-impact sports. The manifestations of biomechanical lesions can vary greatly from individual to individual, depending largely on the site, severity, and nature of the abnormality. Common symptoms typically include pain, swelling, and restricted range of motion in the affected area. In some cases, a limited capacity for physical activities or changes in the body's physical structure, such as an abnormal curvature of the spine or malalignment of limbs, might be witnessed. Often, these conditions develop progressively as repeated strain or stress is applied to the body, though they can also result from a single traumatic event. Various body systems, particularly the musculoskeletal and nervous systems, are primarily impacted by these lesions.