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Table 1 Symptoms according the ICHD-3 (beta) definition and their frequencies

From: Effectiveness of medication in cluster headache

Symptom Frequency (N = 282)
conjunctival injection and/or lacrimation 254 (90%)
nasal congestion and/or rhinorrhoea 267 (95%)
eyelid oedema 124 (44%)
forehead and facial sweating 139 (49%)
forehead and facial flushing 68 (24%)
sensation of fullness in the ear 124 (44%)
miosis and/or ptosis 186 (66%)