When a small child has a fever as high as 400C, physical therapy and medication can be used at the same time. A fever of 400C in children is a very serious condition, and if the temperature is too high, it may cause brain damage, so at this time medication and physical therapy are needed together so that the fever can be reduced. For physical therapy, parents can undress their small children and wipe their bodies with warm water. This will physically dissipate the heat and reduce the body temperature to prevent the fever from becoming too severe. Parents can also take their children to take a hot bath to cool them down through a hot bath, all of which can relieve the symptoms of fever. Medication will require some fever-reducing drugs prescribed by the doctor, and it is important to pay attention to the time and number of times the fever-reducing drugs are taken. Because fever-reducing drugs have certain risks and may cause harm to the child’s body, it is important to take them as prescribed by the doctor. Cool down the temperature by physical therapy and medication original way so that the symptoms may be relieved. If neither of these methods work, you will need to go to the hospital and seek treatment from a professional doctor. Children with fever up to 400C should not be delayed, once the delay occurs, it can cause more serious illness. That is why it is important to treat it promptly.