The difference between myasthenia gravis and myasthenia gravis is mainly that the former is a specific disease, while the latter is only a clinical symptom. Myasthenia gravis is an autoimmune disease in which the lesions are mainly on the postsynaptic membrane acetylcholine receptors. When the disease develops, the patient develops a pathologic susceptibility to fatigue of the skeletal muscles, resulting in weakness after activity that cannot be tolerated under normal activity conditions. When the disease worsens in the later stages, the patient will show weakness of the limbs, unable to walk, hold objects, and even dysphagia, slurred speech, and in the most severe cases, the respiratory muscles will also be involved, resulting in the inability to maintain normal ventilation and hyperventilation. Myasthenia gravis actually includes myasthenia gravis, and also includes other diseases that can cause myasthenia gravis, such as myasthenia gravis caused by hypokalemia, myasthenia gravis caused by progressive muscular dystrophy, as well as polymyositis, Guillain-Barre syndrome, and so on.