When one or more skeletal muscles become inflamed, it is called myositis. The disease has a different etiology, symptomatology, nature of the course and localization. The inflammatory process negatively affects the joints, heart, intestines, skin and lungs. The occurrence of such a disease is rare. In the majority of reported cases, myositis is a systemic disease. This means that all skeletal muscles are involved in the inflammatory process. The most common form is cervical myositis. If we talk about the percentage, then all cases are more than 50%. The second place is myositis of the lumbar spine. Now myositis is called office disease. This is to say that those people who have sedentary work are at risk.