Many people with epilepsy get warning signs seconds to minutes before a larger seizure hits. These warnings, called auras, are actually the very beginning of seizure activity in the brain. They happen while you’re still fully conscious, which gives you a narrow but real window to prepare. Roughly 60 to 70 percent of people with epilepsy experience at least one type of aura, though not everyone recognizes them right away.
An Aura Is Already a Seizure
This is the most important thing to understand: an aura isn’t a separate event that happens before a seizure. It is the seizure, just in its earliest stage. Electrical activity has already started firing abnormally in one small area of the brain. Under current medical classification, an aura is called a focal aware seizure, meaning it starts in one spot and you remain conscious throughout.
What happens next depends on whether that activity stays put or spreads. The aura can remain localized and simply fade, or it can expand across the brain within seconds to minutes, leading to loss of consciousness, convulsions, or both. That progression from a small focal seizure to one affecting the whole brain is why recognizing the aura matters so much. It’s often the only window you have to sit down, move away from danger, or alert someone nearby.
Strange Sensations: Smells, Tastes, and Vision Changes
Some of the most distinctive aura symptoms involve your senses picking up things that aren’t there. People commonly report a sudden foul or burning smell with no source, sometimes described as something rotting or chemical. Others taste metal or something bitter without eating anything. These phantom sensations come from abnormal electrical activity hitting the parts of the brain responsible for smell and taste.
Visual changes are also common. You might see flashing lights, bright spots, or distortions in your field of vision. Some people describe colors looking wrong or objects appearing to change size. Less frequently, people hear sounds that aren’t there, like buzzing, ringing, or muffled voices. Any sudden, unexplained sensory experience that feels “off” and lasts only seconds to a couple of minutes could be an aura, especially if it happens repeatedly in the same pattern.
Emotional and Cognitive Shifts
Not all auras involve the senses. Some hit as sudden, intense emotions that seem to come from nowhere. A wave of fear or panic is one of the most frequently reported aura types, particularly in seizures originating in the temporal lobe. Some people feel a rush of joy or excitement that’s equally unexplained. The key feature is that the emotion feels disconnected from anything actually happening around you.
Déjà vu is another hallmark. Most people experience occasional déjà vu, but the seizure-related version tends to be stronger, more frequent, and sometimes accompanied by other symptoms. The opposite sensation, called jamais vu, can also occur: suddenly a familiar place or person feels completely unfamiliar, almost alien. Some people describe a dreamlike feeling of detachment, as if the world around them has become unreal or they’re watching themselves from outside their own body.
The “Rising” Feeling in Your Stomach
One of the most commonly reported physical warnings is a rising sensation in the abdomen, often compared to the drop you feel on a roller coaster. This is called an epigastric aura, and it originates from abnormal electrical activity hitting the part of the brain’s sensory cortex that represents your gut. It can feel like butterflies, nausea, or a wave of warmth moving upward from your stomach toward your chest and throat.
Other autonomic symptoms can accompany it: a sudden racing heart, flushing, sweating, or goosebumps that appear without reason. Some people experience abdominal pain or an urgent need to vomit. These symptoms overlap with anxiety and digestive issues, which is part of why they’re sometimes dismissed or misidentified for years before someone connects them to seizure activity.
Muscle Twitches and Repetitive Movements
Some auras show up as involuntary physical movements rather than internal sensations. You might notice twitching in one hand, one side of your face, or one foot. Because the seizure activity is still localized to a small brain region, the movement typically affects just one body part rather than your whole body.
As a focal seizure begins to spread, it can also trigger what are called automatisms: repetitive, purposeless movements like lip smacking, swallowing, picking at clothing, or blinking rapidly. You may or may not be aware you’re doing them. If someone else has pointed out that you do something unusual and repetitive right before a seizure, that behavior is likely an automatism and can serve as a visible warning sign for the people around you, even if you don’t notice it yourself.
Prodrome: The Earlier Warning Signs
Some people also notice subtler changes hours or even a full day before a seizure. This is different from an aura. A prodrome isn’t seizure activity itself but rather a shift in how you feel that tends to precede episodes. Common prodromal signs include unusual irritability, difficulty concentrating, a headache that doesn’t match your typical pattern, sleep disruption, or a vague sense that something is “off.”
Prodromes are harder to pin down because they overlap with everyday experiences like stress or poor sleep. But over time, many people learn to recognize their own pattern. The difference in timing is important: a prodrome may give you hours of advance notice, while an aura gives you seconds to minutes.
What To Do When You Feel a Warning
If you recognize that an aura is starting, your priority is reducing the chance of injury. Sit or lie down on the floor if possible. Move away from stairs, roads, sharp objects, or water. If someone is nearby, tell them what’s happening. Even a short phrase like “I’m about to have a seizure” gives them time to help keep you safe. If you’re driving, pull over immediately.
There’s no way to reliably stop a seizure once the electrical activity has started. But getting yourself into a safe position during the seconds you have can be the difference between a seizure that passes without injury and one that results in a fall, a burn, or something worse.
Tracking Your Warning Signs
Your aura pattern is personal. The specific combination of symptoms, their order, and how long you have before a larger seizure follows tend to stay consistent from one episode to the next. That consistency is exactly what makes tracking useful.
Keep a seizure diary, either on paper or through one of several free apps designed for this purpose. Each entry should include the date and time, what you were doing, how much sleep you got the night before, any unusual stress or missed medication, and a detailed description of what the aura felt like. Note how long the warning lasted before the seizure progressed, if it did. Over weeks and months, this log can reveal triggers and patterns that are invisible in the moment. It also gives your neurologist concrete data to work with when adjusting treatment, rather than relying on memory alone.
Consistency matters more than detail. Recording something brief every day, even on days without seizures, produces more useful data than writing long entries only after major events.