Patients with myasthenia gravis tend to be sensitive to cold, mainly due to the following factors: Firstly, patients with myasthenia gravis generally experience overall weakness and have very limited physical activity, making their physique rather frail. Patients with a weak physique are definitely more susceptible to colder environments. Secondly, patients with myasthenia gravis have lower resistance to diseases and often take immunosuppressants for a long time, making them highly susceptible to respiratory and lung infections. In cold conditions, some viruses can exploit this weakness, leading to exacerbated lung and respiratory infections, which is another major reason why patients with myasthenia gravis are sensitive to cold. Thirdly, myasthenia gravis is an autoimmune disease that leads to immune dysfunction. This immune dysfunction makes patients particularly sensitive to cold stimuli. In a cold environment, their immune function may become even more disordered, contributing further to their sensitivity to cold.