Congenital contractures

Your muscles help you move and help your body work. Different types of muscles have different jobs. There are many problems that can affect muscles. Muscle disorders can cause weakness, pain or even paralysis. Causes of muscle disorders includeInjury or overuse, such as sprains or strains, cramps or tendinitis A genetic disorder, such as muscular dystrophySome cancersInflammation, such as myositisDiseases of nerves that affect musclesInfectionsCertain medicinesSometimes the cause is not known.