Muscle aches
Fever and cough makes patients feel exhausted, as mentioned before. Additionally, during the illness fluid is quickly lost through deep breathing, mucus formation, and sweat. This causes dehydration if the patient’s fluid intake is not enough. Since muscles need energy and blood flow to function well, muscle aches and cramps may appear when fluids are not replenished. This symptom is also common in many different diseases, respiratory or not, and it is important to talk to your doctor about it to find out the root cause.