It is relatively common that the fever does not go down after the injection. Most fevers are caused by symptoms of upper respiratory tract infection caused by bacterial or viral invasion. Viruses are cyclical, and the symptoms of immediate fever reduction usually do not occur when glucocorticoids and antipyretic and analgesic drugs are not used. You can take anti-cold medications such as cold and flu granules and MeiYi pseudo-lax capsules orally, which can treat and relieve the symptoms of fever caused by cold and flu. It can be combined with Chinese patent medicines of heat-clearing and detoxifying type, such as antelope horn granules, niuhuangqingxin san, etc. It can also be treated by Chinese herbal tonics, which need to be analyzed by evidence and given with Jing Fang Da Xie Tang or Yin Qiao San plus or minus. If the body temperature exceeds 38.5°C, symptomatic treatment with antipyretic and analgesic drugs, such as ibuprofen and acetaminophen, can be used. Very few patients have fever caused by necrosis of lung tumor, and the effect of drug treatment is not good, so they can be treated by radiotherapy.