Myalgia is typically caused by physical activity, stress or tension, and the pain often goes away with home treatment, according to Healthline. In some cases, myalgia is caused by medical conditions, such as fibromyalgia, the flu and dermatomyositis.
Fibromyalgia is a condition that causes pain in the tendons, joints and muscles, depression, headaches, dizziness, and weakness, notes Cleveland Clinic. Stress may play a major role in its development. The condition is diagnosed through a physical exam and an evaluation of symptoms.
The flu is a viral infection that can cause myalgia, fever, chills and dizziness, explains MedlinePlus. Patients contract the flu virus through air particles containing the virus or by touching an infected surface and bringing it to their bodies. Flu symptoms appear quickly and often go away within a week. Doctors diagnose the illness with a swab test, but most people recover on their own without seeing a doctor.
Dermatomyositis describes a group of muscle diseases that cause chronic muscle inflammation, according to Cleveland Clinic. The condition is characterized by a skin rash that accompanies muscle weakness, and swelling can accompany the rash. Patients with the condition experience other symptoms, such as fever, weight loss and a sensitivity to light. The condition is treated with steroid medications, physical therapy, exercise, assistive devices and surgery.