M63: Disorders of muscle in diseases classified elsewhere

M63.0: Myositis in bacterial diseases classified elsewhere

Myositis in bacterial diseases classified elsewhere is a condition where the muscles become inflamed due to an underlining bacterial infection occurring in a different part of the body. This inflammation primarily affects the skeletal muscles, which are necessary for movement. The cause is usually a systemic bacterial infection that has spread from its original location. Symptoms can take many forms, but often include muscle weakness, pain, tenderness, swelling, and a general feeling of fatigue. Patients may also have difficulty moving the affected muscle group. Over time, without appropriate treatment, the condition can lead to significant disability and impaired mobility due to progressive muscle weakness. The severity of symptoms and disease progression may vary depending on the underlying infection and the body's response to it.