Table of Contents:
- What is a seizure?
- What are the main types of seizures?
- What causes a seizure?
- How long do seizures last?
- How are seizures diagnosed?
- Is there a difference between seizures and epilepsy?
- What medications are used to treat a seizure disorder?
- Do seizure medications have side effects?
- What if seizure medication isn’t effective?
Not all seizures are alike. For some people, seizures can feel like an electric jolt. They drop to the floor, their bodies shaking. For others, seizures can feel as if they’re in a dream. They may stare into the distance or become confused or disoriented. But they don’t lose consciousness.
No matter how you experience seizures, they’re alarming and can take a toll on your quality of life. And they’re more common than you might think. Around 50 million people worldwide have recurring seizures. It’s a condition known as epilepsy.
But there’s good news. Up to 70% of people with epilepsy could live seizure-free with the right treatment. This is according to the World Health Organization. Our expert guide answers all your questions about why seizures happen, what to do if you have a seizure and how to treat it.
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What is a seizure?
A seizure is a burst of electrical activity in your brain. Your brain cells normally talk to one another using electrical currents. It’s how we’re able to walk, talk and perceive the world. But when that current goes off the rails, it can create issues.
A seizure usually starts suddenly, says Emily Klatte, MD. She’s the OhioHealth System medical chief for epilepsy in Columbus. “The neurons in the brain are firing off too much electrical current,” she explains. “And at the end of a seizure, the whole brain feels tired.”
The symptoms depend on the part of the brain that’s affected, says Stephen Wong, MD. He’s the medical director of clinical neurophysiology at Robert Wood Johnson University Hospital in New Brunswick, New Jersey.
“For example, if the electrical activity is in a part of the brain that connects to moving a person’s muscles, there will be muscle cramping,” Dr. Wong says. “If the activity is in the part of the brain that controls vision, the person may see auras or flashing lights.”
What are the main types of seizures?
There are 3 main types. And some people experience more than 1 type. They differ mainly depending on what part of the brain is impacted.
1. Focal onset seizures. These seizures are localized in 1 part of the brain, Dr. Wong says. They are typically caused by brain damage, such as from a stroke, tumor or infection. “This kind of seizure is common in older people,” he adds. If the person stays awake during their seizure, it’s most likely focal.
2. Generalized onset seizures. This type affects both sides of the brain. And it can cause more dramatic seizures with convulsions and loss of consciousness. “Most people who have generalized seizures are born with it, and it’s genetic,” Dr. Wong says.
3. Unknown onset seizures. This is a catch-all bucket for when the start of the seizure is unclear. For example, seizures can happen at night while you’re asleep. They could be subtle, such as staring without moving. Or they could happen when you’re by yourself (and you don’t remember).
What causes a seizure?
They’re caused by a chemical change that affects how your brain cells talk to one another, says Dr. Wong. The trigger for this change could be physical. Examples include a traumatic head injury, an infection or a stroke. It can also be related to chronic conditions — for example, if the blood sugar of someone with diabetes gets too high or too low.
Seizures could also be triggered by alcohol withdrawal or taking certain drugs, says Roy Sucholeiki, MD. He’s a neurologist and epilepsy specialist with Northwestern Medicine in Winfield, Illinois. These are what experts call “provoked seizures.”
That said, for up to half of people who have a seizure, the cause is unknown. Sometimes seizures run in families. So genetics may come into play for some people.
For people who have epilepsy, there are many possible triggers. They include:
- Missing your epilepsy medication
- Not getting enough sleep (a common sleep stealer is sleep apnea)
- Extreme stress
- Binge drinking or having 3 or more alcoholic drinks at a time
- Hormonal changes, such as those that happen around a person’s menstrual cycle
Flashing lights can be a trigger. But that’s true only for about 3% of people with epilepsy, according to Penn Medicine.
How long do seizures last?
A single seizure can last up to 3 minutes. But it can take longer to feel like yourself again, Dr. Sucholeiki says. “The recovery can be immediate, but it often takes minutes to hours.
“Seizures that last longer are considered a medical emergency,” says Dr. Sucholeiki. That’s also true if they occur back-to-back.