Whether it is necessary to do lumbar puncture for children with high fever and convulsions depends on the specific condition. If the fever is caused by respiratory infection, it will usually be relieved in a short time after strengthening treatment and nursing care, so there is no need to do puncture; if the fever is caused by intracranial infection, it is necessary to carry out lumbar puncture examination to make a clear diagnosis and implement symptomatic treatment. 1. Respiratory infectious diseases: due to the relatively low immunity of small children, upper respiratory tract infections or lung infections can be easily induced by cold stimuli, and the condition is so serious that high fever and convulsions may occur, which will be gradually relieved through emergency anti-infective and antipyretic treatments, and lumbar puncture is usually not needed. 2. Intracranial infectious diseases: If a child has a high fever and convulsions, accompanied by a persistent temperature, nausea, projectile vomiting, severe headache and other symptoms, it may be due to intracranial infectious foci, at this time it is necessary to do a lumbar puncture examination, to further clarify the diagnosis, such as meningitis, encephalitis, etc., to avoid delaying the condition. Children with high fever and convulsions, please consult the hospital in a timely manner, according to the doctor’s guidance to choose the appropriate diagnosis and treatment methods, to avoid the influence of adverse factors.