Myositis is a condition characterized by muscle weakness, stiffness and pain. Muscle inflammation happens due to swelling, irritation, or damage to muscle tissues. It can be caused by factors, such as infections, injuries, autoimmune conditions, overuse of muscle among various other factors. This Pdf shares knowledge about what is muscle spasm, its types, causes and how medicine such as Diclofenac & Metaxalone helps provide relieve. For more information on muscle spasm and Diclofenac & Metaxal