Myasthenia gravis is a disease of the neuromuscular junction, essentially an autoimmune inflammatory response that causes generalized weakness and fatigue of the skeletal muscles, with symptoms that are less severe in the morning and worsen by the evening, and fluctuate over time. The weakness can be alleviated by rest. When patients with myasthenia gravis develop a fever, it is generally considered to be caused by an infection, perhaps a viral infection such as an upper respiratory tract infection, which can also induce fever. In such cases, the main treatment involves drinking plenty of water and consuming fresh vegetables and fruits. If necessary, some antiviral medications and antipyretics may be administered. If the fever is due to a bacterial infection, symptomatic treatment should be accompanied by the appropriate antibiotics. However, the choice of antibiotics must be made with caution. Patients with myasthenia gravis should not use aminoglycosides or fluoroquinolones, as these could exacerbate their condition. Penicillins or cephalosporins may be used instead. (Please consult a professional physician for specific medication guidance.)