This is a rare neurological disorder where the body’s immune system mistakenly attacks the peripheral nerves. According to Mayo Clinic, it often starts with weakness and tingling in the extremities and can progress to muscle weakness or paralysis. While the exact cause of Guillain-Barré syndrome isn’t known, it’s often preceded by an infectious illness such as a respiratory infection or the stomach flu. Treatment includes supportive care, intravenous immunoglobulin (IVIG), and plasmapheresis. Physical therapy can help during the recovery phase.