Posted on 14 March 2006.
A febrile seizure is a convulsion triggered by a fever in children. These convulsions happen without any underlying spinal cord or brain infections, or any other neurological reason.
Around 3-5 % of healthy children between nine months and five years old will have a seizure caused by a fever. Toddlers are usually the most affected. There are tendencies indicate that these seizures can run in families.
Mostly, febrile seizures are caused by a rapid rise in the bodies temperature over 102.2 F. Most occur within 24 hours of an illness. The seizure is usually the first sign of a fever.
The febrile seizure is very frightening for parents. Parents are often afraid that the seizure will cause death or brain damage; they feel helpless; or even guilty. It is important to understand that simple febrile seizures are harmless. There are no statistics that show the febrile seizures will cause epilepsy, mental retardation, death, brain damage, learning difficulties or decreased IQ in later life.
Most of the time febrile seizures are caused by fever associated with viral respiratory infections, roseola, or ear infections. Something that should always be considered is that meningitis causes less than 0.1 % of febrile seizures, especially in children under a year old. Meningitis could also be suspected in children that still look sick when the fever comes down. A febrile seizure stops itself anywhere between a few seconds, up to ten minutes after onset. This is usually followed by a drowsiness or confused state. Generally an anticonvulsant drug is not needed.Â
The complex febrile seizure lasts longer than fifteen minutes. This occurs in an isolated part of the body, or is a recurrence during the same illness. One third of children who have had a febrile seizure will have another with a fever. Of the children that do, about half of them will have a third seizure. Very few children have more than three of these seizures in their lives. Febrile seizures can be as mild as the child’s limbs stiffening or eyes rolling. Often a fever triggers full body convulsions. Febrile seizures may begin with contractions of the muscles on both sides of the child’s body. This usually happens to the muscles of the face, legs, arms and trunk. The child usually lets out a cry or a moan; this is caused by muscle contractions. The contractions continue for seconds, or tens of seconds. The child will fall, if standing, and may pass urine. They may vomit, or bite their tongue. The child could stop breathing and may start turning blue. This is understandably a terrifying ordeal for parents.
During the seizure, leave the child on the floor. You may slide a blanket under them if the floor is hard, to protect their head. Only move the child if the area it they are in is dangerous. Loosen any tight clothing, especially around the neck area. If you can, remove clothing from the waist up. If your child vomits, or if there is a build up of saliva or mucous, turn the child onto their side or stomach.
Do not force anything into the mouth to prevent biting on the tongue, and do not try to restrain the child. Apply cool washcloths to neck and facial area to help bring fever down. You can sponge the rest of the child’s body with warm (not cold) water. Cold water can increase the fever. When the seizure is over and the child is awake, administer the normal dose of ibuprofen or acetaminophen. If the seizure lasts for several minutes call 911, and have the child taken to the hospital by ambulance.Â
Children should see a doctor as soon as possible after their first febrile seizure. Until you speak with a doctor, you cannot be sure thta your child has experienced this harmless type of seizure. A child should see a doctor if the seizures keep reoccurring during the same illness, or if it looks like a different type of seizure. Consult your family doctor if you have any questions or concerns about febrile seizures.