Final answer:
Febrile convulsions, also known as febrile seizures, can have red flags that indicate a more serious underlying cause and require immediate medical attention.
Step-by-step explanation:
Febrile convulsions, also known as febrile seizures, are characterized by convulsions or seizures that occur in children during a fever. There are certain red flags that indicate a more serious underlying cause and require immediate medical attention. These red flags include temperature instability, apnea (cessation of breathing), bradycardia (slow heart rate), hypotension (low blood pressure), feeding difficulty, irritability, limpness, seizures, bulging fontanel (soft spot on the head), stiff neck, opisthotonos (rigid body with arched back and head thrown backward), hemiparesis (weakness on one side of the body), and often fatal outcomes.