The most effective diagnostic method for muscle diseases is to do an MRI of the injured area. MRI is a non-invasive test and easy to perform, and it can show the lesions within the muscle very clearly through MRI. Muscle belongs to soft tissue, which does not show up under X-ray, and the diagnosis is relatively poor under CT, but MRI can show various tissues of muscle very well, including physiological tissues and pathological changes, and it can show the lesions of muscle in a very detailed way, and provide a strong support for the diagnosis of muscle diseases, so the most effective diagnostic method of muscle diseases is MRI examination.