“…Many different treatments were experienced. Opioid analgesics [8,21,24] or nonopioid analgesic [22,26], corticosteroids [8,10,33,34,37,44], intravenous immunoglobulin (IVIG) alone [8,12,15,23,27,31,37,39,46,47] or in combination with other specific drugs, such as azathioprine [29], anti-epileptic drugs [4,11,13,16,18,28,32], immunotherapy [14,19,37], hormone therapy [7,43]. Less used are the following therapeutic strategies, in used for specific disorders, such as ARA290, an erythropoietin derivate for sarcoidosis SFN [45], recombinant human nerve growth factor for diabetic SFN [5], propranolol for SFN related to aquagenic pruritus [9], plasma exchange therapy for complex regional pain syndrome [6], enzyme replacement therapy for Fabry related SFN [17,35], botulinum toxin type A for keloid [38].…”