A fever of 102.5°F with body aches and significant chest phlegm may be caused by a viral or bacterial respiratory infection, but the exact cause cannot be determined without a medical evaluation. Since you have a high fever and chest symptoms, it is important to consult a doctor promptly for a proper assessment and diagnosis. Avoid starting additional medications, including antibiotics, without medical advice, as the appropriate treatment depends on the underlying cause. In the meantime, continue taking Dolo 650 only as directed by your doctor or according to the product instructions, stay well hydrated, and get adequate rest. Seek urgent medical attention if you develop difficulty breathing, chest pain, confusion, persistent high fever, bluish lips or face, or worsening symptoms.

Fever with body pain and cough is usually due to a viral infection affecting the body and airways. Take proper rest, drink warm fluids, do steam inhalation, eat light food, and stay well hydrated to support recovery. Keep your throat warm, avoid cold exposure, and monitor your temperature and symptoms. If symptoms worsen, the fever remains high, or you feel very weak, consult a doctor for proper treatment.