Guillain-Barr? Syndrome (GBS) is a rare condition in which the body's immune system mistakenly attacks the nerves, leading to weakness, tingling, numbness, and sometimes paralysis. It often develops a few days or weeks after a viral or bacterial infection, such as fever, cold, diarrhoea, or flu-like illness, although in some cases the exact trigger may not be identified. GBS can occur at any age, but it is more commonly seen in adults and older individuals, though children can also be affected. Symptoms usually begin in the legs and may gradually spread upward to the arms and face. Some people recover within a few weeks or months, while others may take several months to a year or longer for near-complete recovery, depending on the severity of nerve damage. Most patients improve significantly with proper treatment and rehabilitation, although some may continue to have mild weakness, fatigue, or numbness for a long time. The main treatments currently used are intravenous immunoglobulin (IVIG) therapy and plasmapheresis, both of which help reduce the immune attack on the nerves and can improve recovery if started early. Supportive care, physiotherapy, breathing support if needed, and rehabilitation are also extremely important parts of treatment. There is ongoing research into newer immune therapies and better rehabilitation methods, but IVIG and plasmapheresis remain the standard and most effective treatments currently available worldwide. Early diagnosis and treatment are very important because severe cases can affect breathing muscles and become life-threatening if not managed properly.