Most patients with myasthenia gravis can survive for a long period of time, but patients with myasthenia gravis crisis have a higher mortality rate. Myasthenia gravis is an acquired autoimmune system disease that manifests as a dysfunction of the neuromuscular junction. Most patients present with extraocular muscle paralysis or mild-to-moderate generalized muscle weakness, and if the disease is stable, without complications, and with timely and effective treatment, they can generally survive for a long time; some patients present with acute severe muscle weakness, which can affect the respiratory muscles and lead to respiratory distress, and may die at any time if not treated in a timely manner. Patients with myasthenia gravis can take oral cholinesterase inhibitors, starting with small doses and gradually increasing them to maintain daily living. If the disease worsens, adrenocorticosteroids or immunosuppressive drugs may be used as prescribed by the doctor. Most patients may have thymic abnormalities, such as thymic hypertrophy or thymoma, which can be treated surgically.