If you experience leg pain or symptoms of sore limbs along with a cold and fever, it is evident that this is influenza, caused by a viral infection. Under a doctor's guidance, you can take corresponding antiviral medication for treatment. Influenza is typically marked by symptoms such as fever, sore limbs and weakness, and headaches. It is advisable to seek treatment under medical supervision. During treatment, it's important to stay warm, rest plenty, avoid overexertion, and prevent exposure to cold drafts to avoid worsening the condition. Additionally, drinking more water can boost metabolism and enhance your immune system. Appropriate exercise can also strengthen your physique. Moreover, consuming fruits rich in Vitamin C can boost immunity and facilitate cellular repair.