Fever means the temperature of the inside of the body is higher than normal (more than 38 degrees Celsius). Fever actually helps your child’s body fight off infection. Fever by itself does not tell you whether your child is seriously sick.
You might want to measure your child’s body temperature if they feel hot. If they do not seem unwell, you do not need to take their temperature. The most common reason for a child to have a raised temperature is because they are fighting off an infection. A very young baby can get too hot if they are wrapped in too many layers.
There is no foolproof system to tell you whether or not your child is seriously ill but you can check a list of symptoms that indicate a significant health issue. If your baby is under three months old and you are worried about them, they should be checked by a doctor, even if they do not have one of the listed symptoms.