Myotonic dystrophy usually refers to progressive muscular dystrophy, which is a muscle disease in the neurological disorders and should be registered with the Department of Neurology. Progressive muscular dystrophy is characterized by symmetrical muscle weakness and atrophy with progressive exacerbation of symptoms, but usually without sensory deficits. The disease can be further categorized into nine types including X-linked muscular dystrophy, facioscapulohumeral muscular dystrophy, and limb-girdle muscular dystrophy. The disease is a genetic disorder caused by genetic alterations. There is no effective treatment for the disease, but only symptomatic supportive therapy can be used to alleviate the symptoms. Physical therapy and orthopedic treatment can play an important role in maintaining walking function. Myotonic dystrophy belongs to the category of neurological diseases and can be registered with the Department of Neurology. Prenatal testing should be done if there is a similar patient in the couple’s family in order to avoid the birth of a fetus with the disease.