Some children can have a fit or seizure if their temperature rises suddenly. This is called a ‘febrile convulsion’. It is not very common — only 1 in 30 children will ever have them. While these convulsions might alarm you, they do not usually cause any long-term health effects.
Talk to your doctor if you are concerned about febrile convulsions. Seek medical advice immediately if your child has had one for the first time, or it lasts more than 5 minutes.
For more information on febrile seizures, read this fact sheet.