Unmyelinated and myelinated skin nerve damage in Guillain–Barré syndrome: Correlation with pain and recovery

We performed a prospective study in 32 patients with Guillain–Barre syndrome (GBS) or its variants to correlate intraepidermal nerve fiber density (IENFD) at the distal leg and lumbar region with pain, autonomic dysfunction, and outcome. In the acute phase, IENFD was reduced in 60% and 61.9% of patients at the distal leg and lumbar region, respectively. In the acute phase, 43.7% of patients complained of neuropathic pain. Their IENFD at the distal leg was significantly lower than in patients without pain (P