If you have a fever in pregnancy that goes down when you take medication and goes up when you don’t, if you are self-medicating, stop using the medication and seek timely medical examination to clarify the cause of the fever and then target treatment. If the condition recurs after using the medication under the doctor’s guidance, contact the attending doctor in time to inform the situation after using the medication and see if the medication needs to be adjusted. If fever occurs during pregnancy, it is better to check the body temperature, if the temperature is below 38℃, you can use physical cooling, and at the same time, check the cause of the fever, if it is a bacterial infection, you need to be given antibiotics, such as penicillin, cephalosporin and other treatments under the guidance of the doctor, and if it is a viral infection, you need to be given antiviral treatments such as oseltamivir, and so on. If you are sick during pregnancy, you need to seek medical advice and treatment under the guidance of your doctor, so as not to abuse the medication to affect the development of the fetus.