The most typical cause of your symptoms, which include a low fever, body aches, runny nose, fatigue, and weakness, is a viral infection like the flu or common cold. Rest, drinks, light diet, and medications prescribed by your doctor to lower temperature and alleviate symptoms typically help these conditions. The majority of instances resolve in a few days, but you should get in touch with your doctor again if you experience a high temperature, difficulty breathing, chest pain, or symptoms that persist longer than anticipated.