“…The IV infusion of lidocaine has been studied in a number of refractory headache disorders, including short‐lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing (SUNCT), short‐lasting neuralgiform headache attacks with cranial autonomic symptoms (SUNA), chronic migraine, chronic tension type headache, hemicrania continua (HC), and new daily persistent headache . Lidocaine was also reported to be effective in postneurosurgical pain . These open‐label studies reported significant benefit in pain control, with 25% of patients achieving a complete response .…”