Seizures: Types, Causes & Symptoms
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What causes seizures? 77 possible conditions

Seizures are changes in the brain’s electrical activity. This can cause dramatic, noticeable symptoms or even no symptoms at all. The symptoms of a severe seizure are often widely recognized, including violent shaking and loss of control. However, mild... Read more

See a list of possible causes in order from the most common to the least.

1

Epilepsy Overview

Epilepsy is a neurological condition caused by malfunctioning brain cells that result in seizures. There is no cure for this disorder but episodes can become less frequent.

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2

Head Injury

This condition is considered a medical emergency. Urgent care may be required.

A head injury is an injury to your brain, skull, or scalp. All head injuries should be treated seriously and assessed by a doctor.

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3

Eclampsia

This condition is considered a medical emergency. Urgent care may be required.

Eclampsia is a rare but serious condition that causes seizures during pregnancy. You can develop eclampsia even if you don't have a history of seizures.

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4

Generalized Tonic-Clonic Seizure

This condition is considered a medical emergency. Urgent care may be required.

A generalized tonic-clonic seizure, sometimes called a grand mal seizure, is a disturbance in the functioning of both sides of your brain.

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5

Alcohol Withdrawal Delirium

This condition is considered a medical emergency. Urgent care may be required.

Alcohol withdrawal delirium (AWD) is the most serious form of alcohol withdrawal. It causes sudden and severe problems in your brain and nervous system. Approximately five percent of hospital patients being treated fo...

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6

Intracranial Hemorrhages

Intracranial hemorrhage (ICH) is bleeding inside the skull. It is a life-threatening emergency. If you think you or someone you know is experiencing ICH, go to the emergency room right away or call 911. There are fou...

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7

Cerebral Palsy

Cerebral palsy is a group of disorders that affect muscle movement and coordination. Learn about the causes, types, symptoms, and treatment of cerebral palsy.

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8

Concussion

This condition is considered a medical emergency. Urgent care may be required.

A concussion is a mild traumatic brain injury. Usually it occurs after an impact to your head or after a whiplash-type injury. A concussion can cause many severe symptoms that affect brain function.

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9

Brain Hypoxia

Brain hypoxia, also called cerebral hypoxia, is decreased oxygen in the brain. You are at risk for this condition if you are drowning, choking, suffocating, or in cardiac arrest.

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10

Low Blood Sodium (Hyponatremia)

Low blood sodium, or hyponatremia, occurs when water and sodium are out of balance in your body. A quick drop in sodium levels can cause weakness, headache, nausea, and muscle cramps.

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11

Skull Fractures

This condition is considered a medical emergency. Urgent care may be required.

A skull fracture is any break in the cranial bone, or the skull. It can result in bleeding, bruising, pain, and swelling. Less severe symptoms include headache, nausea, confusion, and blurred vision.

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12

Brain Cancer

Brain cancer is rare. Learn more about the different types of brain cancer and its symptoms.

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13

Malignant Hypertension (Arteriolar Nephrosclerosis)

Malignant hypertension is a rare and severe condition in which blood pressure is dangerously high. Learn more about symptoms and treatments.

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14

Amphetamine Dependence

Amphetamines are a type of stimulant and can be highly addictive. Consistent amphetamine dependence can lead to overdose, brain damage, and even death.

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15

Heat Emergencies

This condition is considered a medical emergency. Urgent care may be required.

Heat emergencies are health crises caused by exposure to hot weather and sun. Heat emergencies have three stages: heat cramps, heat exhaustion, and heatstroke.

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16

Subarachnoid hemorrhage

This condition is considered a medical emergency. Urgent care may be required.

Subarachnoid hemorrhage (SAH) refers to bleeding within the subarachnoid space, which is the area between your brain and the tissues that cover it.

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17

Low Blood Sugar (Hypoglycemia)

This condition is considered a medical emergency. Urgent care may be required.

Also known as hypoglycemia, low blood sugar can be a dangerous condition. Hypoglycemia is rare in people who are not suffering from diabetes, the chronic disease that affects the body's ability to regulate blood sugar...

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18

Brain Aneurysm

This condition is considered a medical emergency. Urgent care may be required.

An aneurysm in the brain is a weak area in an artery in the brain that bulges out and fills with blood. It can be unpredictable and life-threatening, and can cause extremely serious conditions.

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19

Intracerebral Hemorrhage

This condition is considered a medical emergency. Urgent care may be required.

Intracerebral hemorrhage (ICH) is when blood suddenly bursts into brain tissue, causing damage to the brain. Symptoms usually appear suddenly during ICH.

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20

Subdural Hematoma

This condition is considered a medical emergency. Urgent care may be required.

A subdural hematoma occurs when blood collects on your brain's surface beneath the skull. They usually result from a head injury.

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This feature is for informational purposes only and should not be used to diagnose.
Please consult a healthcare professional if you have health concerns.
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