There are different clinical manifestations of the causes of fever in patients, mainly: 1. If the fever is caused by a cold, there are usually symptoms of upper respiratory tract infection, such as sore throat, nasal congestion, runny nose, sneezing, accompanied by chills and headache, and general muscle aches and pains. 2, 3.If it is caused by skin infection, local skin redness, swelling, heat and pain will also appear. There are more clinical symptoms of fever. Once a fever is found, the cause should be actively identified and then treatment measures should be taken, and antipyretic drugs should not be abused to avoid covering up the condition.