My son get fever yesterday, but it's gonna be worth, what can i do to make him better?

Is your kid still active running and playing around? If he is having fever (more than 39 degree celcius) and look legarthic, please bring him to doctor or hospital immediately. Also, if he is unable to take any fluid, send him to hospital to avoid dehydration. My protocol for fever is, I will feed paracetamol first, if after 2 hrs fever is still not able to subside, I will give brufen. If brufen is still not able to bring down fever after 2 hrs, I will send to hospital. If paracetamol is working in the first place, and no sign of legarthic or dehydration, I will monitor for 72 hours (3days). When fever is more than 3 days, I will bring to PD for blood test (more than 3 days likely will be an infection).