• Trigeminal nerve (supra-orbital branch). Stabbing, burning, radiating neuralgia round the eye and brow with clock-like periodicity; pains sweep in a ring to temple/occiput; often left-sided but can alternate ([Proving]/[Clinical]) [Hering], [Allen], [Clarke]. See Head/Eyes/Face.
• Periodic fevers (malarial type). Chills/fevers recur at fixed hours or every second/third day; prodromes include orbital pain and aching bones; thirst modalities vary by stage ([Clinical]) [Hale], [Clarke]. See Fever/Chill/Generalities.
• Orbit & ciliary nerves. Neuralgic, congestive ophthalmia with pericorneal injection and photophobia following malaria; pains radiate from brow/inner canthus ([Clinical]) [Allen], [Clarke]. See Eyes.
• Occiput/temporal nerves. Head pains circle from brow to occiput like a band; tingling scalp during onset; recurs at the exact hour [Allen], [Hering]. See Head.
• Autonomic vaso-motor. Sudden flushes, chills, sweat in rigid sequence; skin cold during neuralgic stage; vasospastic traits [Hughes], [Allen]. See Chill/Heat/Sweat.
• Peripheral nerves (bites, stings). Venom-type pains, burning lines from the point of injury; reputed antidotal action in snake/scorpion lesions ([Clinical]/tradition) [Hale], [Clarke]. See Skin/Generalities.
• Spleen/liver (post-malarial). Congestion and left hypochondrial dragging after intermittents; less organ-fixed than Ceanothus/China but present in chronic ague subjects [Clarke], [Farrington]. See Abdomen/Generalities.
• Genital neuralgias. Ovarian/testicular pains with periodic return; paroxysmal, vaso-neural background ([Clinical]) [Clarke], [Allen]. See Female/Male.

• During the free interval between attacks; patient feels comparatively well (defines true periodicity) [Clarke].
• Open air / gentle motion during prodrome (before the “hour strikes”) may delay onset; once fixed time arrives, palliatives fail [Clinical], [Allen].
• Pressure on supra-orbital notch or hot applications over brow and temple during neuralgic stage (temporary relief) [Hering], [Allen].
• Sleep after the paroxysm; short naps restore poise post-attack (Sleep ↔ Generalities) [Clarke].
• Warmth to extremities when chills dominate; hot wraps lessen shivering (Chill) [Allen].
• Steady routines that avoid the known hour; anticipatory rest reduces intensity (Mind/Generalities) [Hale].
• Alternate-day dosing (clinical) matching the cycle in stubborn intermittents (pragmatic adjunct) [Hale].
• Moderate food—light, warm meals before the “hour”—reduces gastric distress accompanying attacks [Allen], [Clarke].

• At the exact hour (to the minute) — daily or tertian/quartan; also worse same season annually (extreme periodicity) [Hering], [Allen], [Clarke].
• Before storms / in damp heat / near marshes; malarial atmospheres reactivate symptoms [Hale], [Clarke].
• Sun-rising/sun-setting transitions; light change provokes orbital neuralgia (Eyes/Head) [Allen].
• Alcohol or coffee on attack days; heightens vascular irritability [Allen].
• Emotional excitement or anticipation of the “hour” (Mind) [Clarke].
• Pressure of hat-brim on supra-orbital point during attack (opposite of pre-pressure palliation) [Allen].
• Exposure of face to wind; draughts strike the orbit and temple (Head/Eyes) [Hering].
• Post-malarial anaemia; fatigue sets stage for relapse (Generalities) [Hale].
• Suppressed sweat in fever cycle; interruption prolongs suffering (Fever) [Clarke].
• Nightwatch / loss of sleep preceding the appointed hour magnifies pain (Sleep/Head) [Allen].
• Recumbency on painful side during orbital neuralgia (Face/Eyes) [Allen].

The Cedron mind learns life by the clock. Confidence rises with long free intervals and collapses as the appointed hour approaches; the patient becomes watchful, counting minutes, a tense expectancy that itself precipitates the paroxysm (Mind ↔ 10b “anticipation worse”) [Clarke]. Irritability mingles with dread; the fear is not abstract but temporal—“it will come exactly at …”—a unique focus compared with China’s exhaustion or Arsenicum’s existential anxiety [Farrington], [Kent]. During the attack, the mind narrows to the orbit of pain: face pinched, speech brief, movements economical lest any jar ripple the trigeminal field (Mind ↔ Head/Eyes) [Allen]. Between attacks, there can be an agreeable lucidity and even briskness; the patient insists he is well if it is not the hour (Mind ↔ Better during interval) [Clarke]. The psyche is often meteorologic; knowledge that a storm is brewing or a muggy marsh-wind is blowing may darken the mood, prefiguring relapse (Mind ↔ Generalities/Modalities) [Hale]. Sleep becomes a bargaining chip—if he sleeps before the time, he hopes to skip the hour; if kept awake, he resigns himself to its exactness (Mind ↔ Sleep) [Allen]. Cedron is less theatrical than Spigelia; its mental signature is precision without panic, a stoic resignation tempered by small rituals (tight band, dark room, hot cloth) which, though insufficient at the hour, lend a sense of control [Farrington], [Clarke]. Post-malarial subjects display cautious planning: avoiding late meals, marsh paths, and long exposure at dawn/dusk (Mind ↔ Stomach/Respiration). After many cycles the mood may flatten into clock-bound melancholy, relieved as soon as the sweat completes the fever sequence (Mind ↔ Fever/Heat/Sweat) [Clarke]. The overall mental essence is that of the chronometric sufferer: ordered, anticipatory, weather-sensitive, and paradoxically well between storms.

Supra-orbital neuralgia is the flagship complaint: stabbing, boring, burning pains centred at the supra-orbital notch, radiating round the eye to temple and occiput in a ring (Proving) [Allen], [Hering]. The pains are periodic to exactness—striking at the same hour daily or every second/third day—and may be heralded by tingling scalp or a minute thread of pain that swells to a band [Clarke], [Allen]. Side-affinity is often left though alternation occurs; motion, light, wind, and jarring footsteps intensify the bolt (10b) [Allen]. Pre-pressure at the notch may delay onset, yet during the attack the slightest touch is intolerable—an instructive reversal (10a/10b nuance) [Allen]. Comparatively, Spigelia is left-orbital with marked eye-movement aggravation and cardiac echoes; Cedron is defined less by heart and more by time, weather, and marsh exposure [Farrington]. China/Chininum sulph. share periodicity but lack the supra-orbital ring-pain signature; their headaches are more diffuse and gastro-vascular [Farrington], [Clarke]. As the fever cycle proceeds, the head pain may give way to heat and then to sweat, closing the loop (Head ↔ Fever) [Clarke].