Myasthenia Gravis: Symptoms, Causes, Treatment

It may affect only eye muscles or involve facial, limb, swallowing and breathing muscles. It differs from general tiredness; strength may improve with rest and weaken again.

Related reading: Guillain–Barré syndrome: a different cause of weakness.

Drooping eyelids, double vision, altered speech, chewing or swallowing difficulty and neck or limb weakness can occur. Severity varies through the day, and not every symptom is present.

Antibodies interfere with neuromuscular communication, sometimes alongside thymus abnormalities. Acquired autoimmune disease differs from inherited congenital myasthenic syndromes, requiring specialist distinction.

The condition affects different ages and may coexist with other autoimmune disorders or thymus changes. Infection, stress and certain medicines may worsen established symptoms; no single trigger explains every case.

Neurological examination, antibody tests and electrical neuromuscular studies support diagnosis, with chest imaging to assess the thymus. A negative antibody result alone does not exclude disease, particularly ocular disease.

Medicines improve signaling or control immune activity according to type and severity. Thymus surgery suits selected cases. Crises require hospital care, respiratory support and rapid therapies such as intravenous immunoglobulin or plasma exchange.

Respiratory crisis or aspiration can occur, while immune treatments require monitoring for infection and other adverse effects. Follow-up balances disease control with treatment safety.

There is no guaranteed preventive method. Follow treatment and infection-management plans and tell every clinician about the diagnosis before new medicines or surgery. Some medicines can worsen weakness.