When your little one isn’t feeling well, it’s a good idea to check their temperature first. A fever can be a sign that something’s amiss, so having a reliable baby thermometer on hand is a smart move. When your child has a fever, it often means their body is actively fighting off an infection. Typically, a fever is considered anything above 38°C (100.4°F). While it can be worrying, it’s usually a good sign that their immune system is hard at work.