M79: Other soft tissue disorders, not elsewhere classified

M79.1: Myalgia

Myalgia, commonly known as muscle pain, is a symptom that can occur in any area of the body that contains muscles. This discomfort can range from a mild ache or stiffness to severe pain that hinders movements and daily activities. Some symptoms associated with myalgia include pain, tenderness, and weakness in the muscles. It can be brought on by a wide variety of conditions and factors like tension, overuse, strain during physical labor or exercise, injuries, or systemic diseases like influenza or fibromyalgia. It is important to note that myalgia can either be localized, affecting only one muscle group, or it can be widespread, affecting multiple muscle groups across the body. The progression of symptoms can vary greatly, depending on the underlying cause.