The do’s and don’ts when faced with an infantile seizure. Infantile seizures are more common than you think. Last week my little one suffered a series of seizures, due to a high temperature. A temperature is anything over 37.5C when taking a child’s temperature, orally. In the majority of cases, these are nothing to worry about. They stop when the child turns 5 years old. They are also often only triggered by high temperatures. On rare occasions, they may be a sign of something underlying. It is always wise to seek medical attention on the first occasion.