Most seizures last between a few seconds and two minutes, depending on the type. A seizure that continues beyond five minutes is a medical emergency requiring immediate help. Understanding the typical duration for different seizure types helps you recognize what’s normal, what’s not, and when to act.
Duration by Seizure Type
Not all seizures look the same, and they vary widely in how long they last. The type of seizure determines whether you’re looking at something that lasts a fraction of a second or several minutes.
Absence seizures are among the shortest. Most last less than 15 seconds and look like a brief blank stare. They’re most common in children, who can experience 10, 50, or even 100 episodes in a single day. Because they’re so brief, they often go unnoticed by parents and teachers.
Myoclonic seizures are even shorter in terms of the actual muscle activity involved. Each jerk typically lasts less than 350 milliseconds, essentially a sudden, shock-like contraction that’s over almost before you register it. These seizures usually don’t last longer than one or two seconds total, though they can occur in clusters.
Focal seizures (sometimes called partial seizures) vary based on whether awareness is affected. A focal aware seizure, where the person remains conscious, typically lasts seconds to a couple of minutes. Focal impaired awareness seizures, where the person seems “out of it” and can’t respond to questions or directions, generally last a few minutes.
Tonic-clonic seizures are the type most people picture when they think of a seizure: the body stiffens, then jerks rhythmically. These typically last one to three minutes. Any tonic-clonic seizure lasting beyond five minutes needs emergency medical attention.
The Five-Minute Rule
If a seizure lasts longer than five minutes, call 911. This threshold is used by the CDC and major epilepsy organizations because prolonged seizures can cause brain injury and become harder to stop the longer they continue. The condition is called status epilepticus, and it requires emergency treatment.
This is why timing a seizure matters. When you witness someone having a seizure, note the time it starts. It’s easy to overestimate how long a seizure lasts when you’re watching one unfold in real time. What feels like ten minutes may actually be 90 seconds. A clock or phone timer gives you the objective information you need to decide whether to call for help.
What Happens Before a Seizure
Some people experience a warning phase called an aura before a seizure begins. An aura typically lasts seconds to minutes and can involve strange sensations like a rising feeling in the stomach, unusual smells or tastes, visual disturbances, or a sudden wave of fear or déjà vu. Technically, an aura is itself a small focal seizure, but because the person remains aware during it, they can often remember the experience afterward. For some people, an aura provides enough warning to sit down or move to a safe location before a larger seizure follows.
Recovery Time After a Seizure
The seizure itself is only part of the timeline. After a seizure ends, most people enter a recovery phase called the postictal state. This can involve confusion, fatigue, headache, muscle soreness, difficulty speaking, or emotional changes like anxiety or sadness.
The postictal state lasts anywhere from five to 30 minutes on average, though the full range stretches from a few minutes to a few days. How long recovery takes depends on the person and the type of seizure. A brief absence seizure may have no noticeable recovery period at all, while a tonic-clonic seizure can leave someone exhausted and confused for hours. Symptoms typically resolve on their own within 24 hours. If they persist beyond that, it’s worth contacting a healthcare provider.
Febrile Seizures in Children
Febrile seizures happen in young children during a fever and are the most common type of seizure in kids under five. Simple febrile seizures, which account for the majority, last a few seconds up to 15 minutes and occur only once within a 24-hour period.
Complex febrile seizures last longer than 15 minutes, happen more than once in 24 hours, or affect only one side of the body. While febrile seizures are frightening to witness, simple febrile seizures generally don’t cause lasting harm. The distinction between simple and complex matters because complex febrile seizures warrant closer medical follow-up.
When Seizures Come in Clusters
Some people don’t experience seizures as isolated events. Seizure clusters are commonly defined as two or more seizures within a six-hour period, or three or more within 24 hours. While each individual seizure in a cluster may last a typical duration, the pattern of repeated seizures over a short window is clinically significant and often requires a specific rescue treatment plan. If you or someone you know experiences seizures that start coming in groups when they previously occurred singly, that change in pattern is important information for a neurologist.