Upper respiratory infections generally come with symptoms of fever and the illness usually lasts about seven to eight days, with the fever persisting for about three to four days. It's suggested not to worry too much. If the temperature exceeds 38.5 degrees Celsius, it's then advisable to take some antipyretic medication to reduce the fever. During this period, use physical cooling methods, drink plenty of water to promote metabolism and enhance immunity. Diet should be light, and one can also take some heat-clearing, detoxifying, and fire-eliminating medicines. Regular physical exercise is also important to strengthen the physique. Avoid staying up late and ensure sufficient sleep. It's advised to have appropriate examinations and proceed with targeted treatments after a clear diagnosis, which is crucial. It's also recommended to frequently ventilate indoor spaces to maintain fresh air.