Patients with myasthenia gravis are most afraid of developing a fever, as a fever may indicate an infection, especially a bacterial infection. If a bacterial infection occurs, it can easily trigger a myasthenic crisis. The patient may experience weakness in breathing and even respiratory failure, which can be life-threatening. Therefore, it is essential to address the situation promptly. The recommended approach when a fever occurs is as follows: First, quickly determine the cause of the fever, complete routine blood tests, calcitonin, and other relevant assays to confirm if it is caused by a bacterial infection. Second, symptomatically manage the fever, possibly using antipyretic medications. Third, if it is a bacterial infection, it is crucial to promptly administer a significant amount of effective antibiotics to treat it. Controlling the bacterial infection can prevent the progression of myasthenia gravis to a more severe state. (Note: Medication should be used under the guidance of a doctor.)