Myositis is an inflammatory lesion of muscles. Skeletal musculation which the person controls randomly, not unstrained involuntary muscles of internals are affected.

More often myositis develops because of infections. Angina, flu, pneumonia, meningitis are complicated by myositis. At diffusion of infection in the organism in muscles suppurated focuses are formed. Penetration of infection can happen because of trauma with damage of skin or usual intramuscular injection made without sterility observance.

Also excessive exercise stresses, cold, vibration lead to myositis.

Symptoms of myositis are similar to signs of any inflammation – pain, reddening, and swelling. The movements of muscle are held down and painful. Muscles of back are more often than others are affected with myositis. The pain arising thus needs to be distinguished from accompanying lesions of backbone and nervous roots. At first pain is not acute, aching, develops only at movements and palpation of muscles. Later on pain becomes more intensive and persistent. Intensifying of pain is followed by temperature increase, local and general (fever). Emergence of fever is a sign of purulent myositis. Locally at purulent myositis there is a “fluctuation” under skin when pressing.

The volume of movements in muscles decreases, the skin and nervous fibers are often affected. At chronic myositis sometimes there is “shrinkage” of muscles because of irreversible atrophic changes.

Treatment of myosites depends on its cause. Usually apply anesthetics and anti-inflammation medicines are applied. They kill pain and fever, but don’t eliminate the myositis cause. At infectious myosites it is necessary to apply antibiotics if the pyesis developed; surgery is necessary.