Myasthenia gravis is a disease of the neuromuscular junction and also an autoimmune disease, caused by a dysfunction in the patient's immune system. Early symptoms of myasthenia gravis may include mild general fatigue, which can be relieved by rest, and may not be particularly concerning to the individual. Some patients may initially exhibit slight ptosis and occasional double vision as clinical symptoms, which they might not take very seriously either. As the disease progresses, the symptoms become more severe, such as noticeable ptosis, double vision, slurred speech, difficulty swallowing, and even potential weakness of the respiratory muscles, leading to respiratory failure.