Pain in the lower back during fever is mostly caused by bacterial or viral invasion, causing fever due to symptoms of upper respiratory tract infection, and high fever can cause pain in the lower back due to muscle aches and pains. Chinese medicine believes that the fever is caused by the invasion of external evil, which attacks the lung health and causes the loss of lung health, and the pain in the lower back is caused by the blockage of meridians. Very few patients have fever caused by urinary tract infection and have lumbar pain. Routine blood, urine and ion analysis can be checked. The blood picture can be analyzed. If the fever is caused by upper respiratory tract infection, symptomatic treatment with anti-cold medications, such as Benoxate dispersible tablets, MeiYi pseudo-lax capsules, compound aminoglycoside tablets, etc. can be used. If the fever is caused by urinary infection, you can take oral levofloxacin, which can control urinary tract infection.