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Figure 2: An overview of the trigeminal autonomic cephalalgias based on the duration and frequency of attacks. SUNCT/SUNA = Short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing/short-lasting unilateral neuralgiform headache attacks with cranial autonomic features, PH = Paroxysmal hemicrania, CH = Cluster headache, HC = Hemicrania continua

Figure 2: An overview of the trigeminal autonomic cephalalgias based on the duration and frequency of attacks. SUNCT/SUNA = Short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing/short-lasting unilateral neuralgiform headache attacks with cranial autonomic features, PH = Paroxysmal hemicrania, CH = Cluster headache, HC = Hemicrania continua