A side-locked headache is one that occurs most of the time (> 90%) on the same side. Prakash and Rathore outline a number of provocative tests which can help to identify a secondary cause for the headache.
Test
Condition
pressure of tooth
dental pain
pressure over tonsillar fossa
enlarged styloid
pressure over eyeball (globe)
ocular inflammation
pressure over supero-medial orbit
trochelitis
pressure over eyebrow
supraorbital neuralgia
tenderness over frontal sinus
frontal sinusitis
tenderness over maxillary sinus
maxillary sinusitis
tenderness over temporal artery
temporal arteritis
pressure over temporomandibular joint
disorder of TMJ
pressure over ear
ear disorder
pressure over occipital nerve
occipital neuralgia
pressure over upper posterior neck
cervicogenic headache
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