Myasthenia gravis is a neuromuscular autoimmune disease that occurs more often in women in adulthood. The most pronounced symptom of the disease is muscle weakness that decreases after rest. Although the disease is mostly caused by the production of antibodies to acetylcholine receptors, in 10-15% it is caused by thymoma. The most common symptoms of the disease are ptosis, double vision, fatigue, dysphagia, dysarthria, weakness of the muscles of the arms and legs. In the diagnosis of the disease, we use electromyoneurography, laboratory tests, radiological diagnostics and conducting the Tenzilon test. The disease is treated conservatively with immunosuppressants, corticosteroids, acetylcholinesterase inhibitors, plasmapheresis and intravenous immunoglobulins, and surgically if there is a tumor of the thymus gland. A characteristic feature of this disease is the occurrence of myasthenic and cholinergic crises that require emergency treatment. Rehabilitation should be carried out regularly, but in a moderate manner, and psychological help should be provided. The aim of nursing care is to increase the degree of independence in performing activities that the patient cannot perform alone.