Myasthenia gravis is a long-term chronic disease with a certain relapse rate, which can be maintained for years to decades without relapse after regular hormone and immunosuppressive system treatment. Irregular treatment or improper hormone reduction can lead to prolonged symptoms. Therefore, patients should establish the confidence and determination to fight against the disease for a long time, reduce the psychological burden, avoid mental stimulation and excessive mental exertion, and be sure to treat and reduce the dosage under the guidance of a specialist, and not to reduce the dosage by themselves or change doctors and places frequently. 2.Factors that may lead to relapse include: overexertion, cold or infection in other parts of the body, general anesthesia, etc., which should be avoided as much as possible. If there is difficulty in swallowing, difficulty in breathing and other critical conditions, please come to hospital immediately or go to the emergency room. 3, pay attention to moderate exercise, exercise to enhance physical fitness, but not too much exercise, blindly increase exercise will not benefit the patient, but will aggravate fatigue, so the patient should choose some exercises to help restore health according to their own situation, we recommend walking combined with appropriate physical exercise, exercise pay attention to self-protection, avoid falls; 4, medication note: Valium drugs should be used with caution, especially patients who have had respiratory muscle The patient with respiratory muscle involvement is prohibited. Sulfonamides and aminoglycosides should also be used with caution, as they may aggravate the disease, and cephalosporins should be used when antibacterial agents are needed for infection.