The baby’s fever is well old convulsions may be high fever convulsions, central nervous system infection, epilepsy, low calcium or low magnesium and so on. 1. The central nervous system of infants is immature, and fever will consume the energy and oxygen of the cells, which will make the nerve cells abnormally excited and show the symptoms of convulsions. You need to pay attention to the baby’s temperature at any time after cooling down to prevent another fever. 2. If the central nervous system has an infection, such as meningitis and other diseases, can also lead to convulsions after the fever, you need to be under the guidance of the doctor for symptomatic treatment, because this is a more serious situation, avoid blind use of drugs. 3. If you suffer from epilepsy, fever can induce convulsions, and this symptom will continue after cooling down, so you should also actively treat it, try to lie flat or sideways, to avoid accidental inhalation of oral secretions into the lungs and choking, and you can also use something hard to put into the mouth, to prevent seizures from biting the tongue. 4. Low calcium and magnesium can also cause convulsions. As the serum level of calcium and magnesium ions decreases, neuromuscular excitability increases and muscle contraction occurs, resulting in twitching of the face, back, and leg muscles, and in severe cases, twitching of the hands and feet, laryngeal spasms, and generalized epilepsy. This is when calcium and magnesium supplementation is needed depending on ion levels. If the convulsions continue after the fever has cleared, you need to seek medical attention and follow the doctor’s instructions.