3. Body Aches
When you have caught the flu, you may suddenly experience aches and pains and are not sure of their source. These aches can develop before a fever, and you may suspect you pulled a muscle during a workout or while doing household chores. Body aches are so much a part of the flu, that few wonders why they accompany this illness.
The reason you may feel aches and pains is actually the result of white blood cells being released to fight the invasion of the virus. This is an important strategy your body uses to defend itself, but the chemicals released to power the white blood cells can also make your muscles feel achy.
You may feel better about this discomfort knowing that it is a sign your body is doing what it should be doing and fighting off the illness. Aches can also result from dehydration, so drink plenty of fluids.