If you have a fever greater than 38.5 degrees, you can use an injection to treat it, but the injection is often not a fever-reducing injection, but mainly a medication to treat the cause of the fever. First of all, if the body temperature is relatively low, it is certainly not recommended to give injections for treatment, and it is not necessary to take fever-reducing drugs at this time, but to find the cause of the fever to carry out oral medication for better results. For example, if you have a fever caused by a cold, you can use cold and fever granules or aminophenol pseudo-lax dispersible tablets for treatment. If you have a sore throat, you can use Pudilan Anti-inflammatory Oral Liquid to treat it. If the fever is caused by diarrhea, it can be treated with Simethicone. Secondly, if the fever is higher than 38.5 degrees, intravenous antibiotics can be administered if the fever is caused by a bacterial infection. If a viral infection occurs and the fever temperature is high, intravenous Xiyampin or Ribavirin can be used to treat the fever.