Hello ? girls, my little one has a temperature of 37, that is, it's no…

Hello ? girls, my little one has a temperature of 37, that is, it's not hot, only his head is hot, cheeks can be cold and his head is specifically hot, the body is warm but not hot, he walks around, smiles, sleeps normally, eats, you can't tell from him that he's sick, I called the doctor, she said don't panic, maybe it's just eaten, woke up, but it wasn't like this before, it's been 4 days like this, either hot head or normal, could it be on teeth? Fingers and fist in the mouth constantly, but we're only 4 months old.