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Diseases and injuries:
Muscle diseases affect the muscles, can cause weakness, pain or even paralysis. They have different causes, for example: genetics, cancer, inflammation, infections, caused by medications, diseases of the nerves that affect the muscles.
-Muscular disthrophy
Is a group of diseases that cause progressive weakness and loss of muscle mass. In muscular dystrophy, abnormal genes (mutations) interfere with the production of proteins needed to form healthy muscle.
Symptoms
The main sign of muscular dystrophy is progressive muscle weakness. Specific signs and symptoms begin at different ages and in different muscle groups, depending on the type of muscular dystrophy.
-Mytosis
Refers to any condition causing inflammation in muscles. Weakness, swelling, and pain are the most common myositis symptoms. Myositis causes include infection, injury, autoimmune conditions, and drug side effects. Treatment of myositis varies according to the cause.
Symptoms
The main symptom of myositis is muscle weakness. The weakness may be noticeable or may only be found with testing. Muscle pain (myalgias) may or may not be present