What is Guillain-Barré Syndrome?

Guillain-Barré syndrome (GBS) is a rare condition in which the body’s immune system mistakenly attacks nerves outside the brain and spinal cord. These nerves help control movement and sensation, so when they’re damaged, it can affect how your body feels and moves.

GBS often develops quickly, sometimes over just a few days. Because symptoms can worsen rapidly, it usually requires hospital care.

The exact cause isn’t fully understood. In many cases, GBS develops after the body fights off an infection, such as a cold, flu, or stomach illness. Less commonly, it may follow surgery, injury, or vaccination. The immune system then mistakenly attacks the protective covering of nerves, disrupting normal signals.

Symptoms

GBS often begins with mild symptoms that gradually spread. Early recognition is important so treatment can begin right away.

Common symptoms include:

• Weakness that starts in the legs and moves upward
• Tingling or “pins and needles” sensations
• Trouble with balance or walking
• Loss of reflexes
• Pain in the back, arms, or legs
• Difficulty breathing in severe cases
• Changes in heart rate or blood pressure

How is it diagnosed?

Diagnosing GBS starts with a careful review of your symptoms and a physical exam. Providers look for patterns like weakness on both sides of the body and reduced reflexes.

To confirm the diagnosis, tests may include:

• A spinal tap to check protein levels in the fluid around the brain and spinal cord
• Nerve tests to measure how well signals travel through the nerves
• Muscle activity studies to assess nerve and muscle function

Because symptoms can change quickly, ongoing monitoring is often needed.

How is it treated?

Treatment for GBS focuses on stopping the immune system from damaging the nerves and supporting the body during recovery.

Early treatments may include:

• Intravenous immunoglobulin (IVIG): Helps calm the immune response
• Plasma exchange (plasmapheresis): Removes harmful antibodies from the blood

Supportive care is also essential. This may involve breathing assistance, heart monitoring, and pain management medications.

As symptoms improve, rehabilitation becomes important. Physical therapy helps rebuild strength, improve movement, and support a safe return to daily activities.

Recovery times vary. Many people regain most or all of their strength, though some may continue to experience fatigue or mild weakness.