Understanding Seizure Prodrome: Warning Signs & Symptoms

A seizure prodrome is a subjective, pre-ictal state occurring hours to days before a seizure, distinct from an aura (which is the initial ictal manifestation). Recognizing prodromes allows preventive action.

Prodrome (Hours–Days Before)

• Mood/Behavioral: Irritability, anxiety, restlessness, agitation, depression, euphoria.
• Cognitive: Confusion, difficulty concentrating, memory lapses, “brain fog.”
• Physical: Fatigue, headache, muscle tension, sleep disturbance (insomnia/hypersomnia), appetite change, nausea, GI upset.
• Autonomic: Palpitations, sweating, temperature dysregulation, urinary frequency.
• Sensory: Heightened sensitivity to light/sound/smell; vague “funny feeling.”

Not specific; many conditions cause similar symptoms. Patient/caregiver pattern recognition is key.

Aura (Seconds–Minutes Before; Part of Seizure)

Focal aware seizure; localizable to seizure onset zone.

• Visual: Flashes, spots, scintillations, tunnel vision, formed images (occipital).
• Somatosensory: Tingling, numbness, pain, thermal sensation (parietal).
• Auditory: Buzzing, ringing, voices (temporal).
• Olfactory/Gustatory: Burning rubber, rotten eggs, metallic taste (mesial temporal).
• Autonomic: Epigastric rising sensation, nausea, flushing, piloerection (insula/cingulate).
• Psychic: Déjà vu, jamais vu, fear, ecstasy, forced thinking (temporal/limbic).
• Motor: Focal twitching, version (eye/head turning), posturing (frontal).

Seizure Types (Brief)

• Focal Aware (Aura only): Consciousness intact.
• Focal Impaired Awareness: Consciousness altered; automatisms (lip-smacking, fumbling).
• Focal to Bilateral Tonic-Clonic: Spread to both hemispheres.
• Generalized Onset: Absence, myoclonic, tonic, clonic, tonic-clonic, atonic.

Action on Prodrome/Aura

1. Move to safe place (sit/lie down, away from hazards).
2. Alert companion / activate seizure plan.
3. Rescue medication if prescribed (benzodiazepine: midazolam nasal, lorazepam sublingual, diazepam rectal).
4. Time the event.

When to Seek Neurology Care

• New prodromal/aura symptoms.
• Change in seizure pattern/frequency.
• Injury during seizure.
• Medication side effects or non-adherence.
• Desire to optimize control (e.g., pre-pregnancy).

Seizure diaries (paper/app) tracking prodromes, auras, triggers, meds, sleep, stress are invaluable for management.