Low fever, sore throat, and body aches and pains are usually muscle aches and pains caused by fever. It may be an upper respiratory tract infection. Usually catching a cold or having a lowered resistance, staying up late, or being tired can lead to upper respiratory tract infection. The diagnosis can be confirmed by checking the blood routine, taking temperature and taking chest X-ray. If it is a bacterial infection, you can take cefradin, amoxicillin, or quinolone antibiotics, azithromycin and other drugs to treat it, together with cold and flu pass or platelet flush. It may also be a viral infection, you can take antiviral drugs such as acyclovir and oseltamivir to treat it. Drink more water, pay attention to rest, usually do not eat spicy and stimulating food, exercise more, enhance physical fitness, prevent colds.