Table 1 Proportion of patients with Side-locked pain in different primary headache disorders

Migraine

17–31 % [1]

Tension-type headache

4–36 % [1]

Cluster headache

69–92 % [3]

Paroxysmal Hemicrania

85–97 % [40]

SUNCT/SUNA

80–88 % [1, 3]

Hemicrania continua

92–100 % [41]

Primary stabbing

22–56 % [9]

Nummular headache

93–100 % [5, 45]

Hypnic headache

22–45 % [49]

NDPH

11–18 % [2]

Epicranial Fugax

~100 % [10]