Sometimes a fever is temporary. There are many infections or internal developments that cause the body to raise the temperature temporarily. In such situations, when you take paracetamol, the fever goes down. In the meantime, the body recovers, and the antigens can contain the pathogen and the body is no longer under threat. You may need to take a couple of paracetamols and after that you feel fine. In such cases, there is no need to take a fever test. A test is needed when the fever does not go down and even if it goes down after taking a paracetamol, it goes up again, successively. It means something serious is happening inside your body and you need to find what’s the problem. Then you definitely need a fever test.