What is muscular dystrophy and what causes it?
Muscular dystrophy is a group of diseases that make muscles weaker and less flexible over time.
It is caused by a problem in the genes that control how the body keeps muscles healthy. Each form of muscular dystrophy is caused by a genetic mutation particular to that type of the disease.
For some people, the disease starts early in childhood. Others don’t have any symptoms until they are teenagers or middle-aged adults.