Fever and weakness in the limbs may be a cold when blood diseases, rheumatic immune diseases or infectious diseases are excluded. If there is coughing, coughing phlegm, itchy throat, sore throat or runny nose and headache, there will be more cases of wind-cold cold. If the body temperature is within 38.5℃, you can cool your body by physical cooling, such as lying in bed with a good quilt and wiping your body with a warm towel, hot water can evaporate to take away the temperature of the body surface, which can assist in cooling. At the same time, you need to drink more water, the daily water intake needs to be more than normal, it can be around 2500-3000ml, which can increase the metabolism of fluid and improve immunity. If the body temperature exceeds 38.5℃, you need to take NSAIDs or antipyretics to relieve the symptoms of fever and weakness of limbs caused by wind and cold. If it is accompanied by coughing up yellow sputum or fever with more obvious symptoms, as well as panic, palpitations, chest tightness or swollen limbs, it is necessary to go to a hospital specialist to check blood analysis, kidney function, ion or immune system indicators to exclude fever and weakness of limbs caused by other diseases.