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Symptom Checker

Step 4: Read and complete the decision guide to learn more about your symptoms.

Diffuse Muscle Weakness

From your answers, you could have dermatomyositis or polymyositis. As mentioned before, these are conditions of unknown cause in which inflammation develops in the muscles, perhaps due to a faulty immune system.

See your doctor about this. He or she will review your symptoms, perform a physical examination, and may recommend some basic blood tests. With these, your doctor may be able to tell you whether one of these conditions is likely.

Additional testing, such as an electromyogram, nerve conduction testing, and a muscle biopsy, may be needed to confirm the diagnosis.

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