Guillain-Barre syndrome is a rare disorder where the immune system attacks the peripheral nervous system, damaging nerves and causing muscle weakness and paralysis. It has several forms but commonly results in ascending paralysis beginning in the lower extremities. It is often triggered by a bacterial or viral infection and works by demyelinating peripheral nerves. Diagnosis involves spinal fluid analysis and nerve conduction tests. Treatment focuses on supportive care like ventilation and plasma exchange or IV immunoglobulin to stop antibody damage. Nursing care monitors for complications and manages symptoms like respiratory issues, mobility, nutrition, and autonomic dysfunction.