An oncoming seizure often announces itself with a distinct set of warning sensations that can begin seconds to as long as 60 minutes before the seizure itself. These warnings fall into two phases: a prodrome, which can start hours or even days ahead, and an aura, which is actually the very beginning of the seizure. About 70% of people with epilepsy experience auras, and learning to recognize them can provide crucial time to get to a safe place.
The Prodrome: Hours or Days Before
The earliest warning signs aren’t dramatic. They’re subtle shifts in mood and behavior that can begin hours or even days before a seizure. The most common prodromal symptoms include irritability, anxiety, confusion, headache, tremor, and sudden anger or other mood disturbances. Many people describe feeling “off” without being able to explain why.
Because these changes are so nonspecific, they’re easy to dismiss as a bad day or poor sleep. Over time, though, people with epilepsy often learn to recognize patterns. A partner or family member may notice the shift before the person themselves does.
The Aura: The Seizure’s Opening Seconds
What most people call an “aura” is technically already a seizure, just a very small one. It’s a focal aware seizure, meaning abnormal electrical activity has started in one part of the brain but hasn’t spread yet. You remain conscious and aware during this phase, which is what makes it useful as a warning. Auras typically last from a few seconds to a couple of minutes, though in rare cases they can stretch longer.
What the aura feels like depends entirely on which part of the brain is firing. This is why two people with epilepsy can describe completely different warning signs.
Strange Feelings in the Stomach
One of the most commonly reported aura sensations is a rising feeling in the abdomen, sometimes described as a wave of warmth, nausea, or butterflies that moves upward from the stomach toward the chest and throat. Doctors call this “epigastric rising,” and it’s strongly associated with seizures originating in the temporal lobe. Some people also experience sudden hunger, abdominal pain, or goosebumps alongside it. The sensation is distinct from ordinary nausea because of the rising, wave-like quality and the fact that it comes on suddenly without any digestive cause.
Visual, Auditory, and Smell Disturbances
Sensory auras can affect any of the senses, but vision, hearing, and smell are the most common.
- Visual: Flashing or flickering lights, bright colored spots (often small and circular), simple geometric patterns, or brief blind spots. These tend to develop fast, last only seconds, and look the same each time they occur.
- Auditory: Buzzing, ringing, drumming, or hearing a single tone that isn’t there. These are elementary sounds, not voices or music.
- Smell: A sudden odor, usually unpleasant, with no identifiable source. People often describe it as a burning or chemical smell.
Déjà Vu, Fear, and Emotional Surges
Temporal lobe auras are particularly known for producing intense cognitive and emotional experiences. The most recognizable is déjà vu, a powerful, unmistakable feeling that the present moment has happened before. It’s more vivid and prolonged than the ordinary déjà vu most people experience occasionally. Some people get the opposite: jamais vu, where familiar surroundings suddenly feel completely foreign.
Sudden, intense emotions are also common. A wave of fear or dread with no apparent cause is one of the most frequently reported experiences. Some people feel an unexpected rush of joy or a strange sense of detachment from their surroundings. These emotional surges come on abruptly and feel disproportionate to anything happening around you, which is often what tips people off that something neurological is going on.
Twitching and Muscle Stiffness
Some auras involve early motor symptoms rather than sensory ones. These typically start small: a twitch in one finger, a jerking movement in the hand, or involuntary tightening of muscles on one side of the face. The twitching often affects the face, hands, or toes on just one side of the body.
In some cases, this activity “marches,” spreading from the hand up the arm, or from the foot up the leg, and sometimes continuing to the face on the same side. This progressive spread, called a Jacksonian march, can happen over seconds to minutes. After these motor symptoms resolve, many people experience temporary weakness or paralysis in the affected body parts.
Repetitive automatic movements can also appear: lip smacking, blinking, or rhythmic tapping of a finger. These movements are involuntary and the person may not be aware they’re doing them.
How Seizure Auras Differ From Migraine Auras
Because both seizures and migraines can produce visual disturbances, the two are sometimes confused. The differences are fairly reliable. Migraine auras tend to be slow-spreading, monochromatic (black and white or achromatic), and feature zigzag lines that drift toward the periphery of your vision over several minutes. They typically affect one side of the visual field and may leave a temporary blind spot.
Seizure auras, by contrast, are faster. They develop in seconds, are usually brightly colored, and appear as small circular flashing spots rather than zigzag patterns. Seizure auras also tend to be shorter and more stereotyped, meaning they look nearly identical every time they happen. If your visual disturbances are accompanied by déjà vu, a rising stomach sensation, or sudden fear, that combination points strongly toward a seizure origin.
What To Do With a Warning
Recognizing your personal aura pattern gives you a narrow but real window to act. Most people use this time to sit or lie down somewhere safe, move away from stairs or sharp objects, and alert someone nearby. If you drive, pulling over immediately is critical.
Keeping a seizure diary that tracks what your aura feels like, how long it lasts, and what happens afterward helps build a reliable picture over time. The specific type of aura you experience also gives neurologists valuable information about where in the brain your seizures originate, which directly affects treatment decisions. Not every seizure will be preceded by a noticeable warning, but when one occurs, recognizing it quickly makes a meaningful difference in staying safe.