“…Several strategies have been proposed: acupuncture [7], creams or gels with several agents (nitrites, anesthetics, calcium antagonists, sucralfate, metronidazole, salsobromoiodic, cholestyramine) for topical application [8], [9], [10], [11], [12], [13], [14], [15], nonsteroidal anti-inflammatory suppositories [11], local infiltration with botulinum toxin [16], or local anesthetic agents [5], [6], [17] or even ambulatory PCA (patient controlled analgesia) pumps [18].…”