12 Common Symptoms Of The Flu

8. Headaches

Although not all flu patients experience this symptom, a headache may affect someone infected with the virus. Along with the pain may come a sensitivity to light, or even to sound or smell. A flu-related headache typically occurs along with other symptoms. If you are not experiencing any other symptoms, your headache may be caused by something else, such as tension or a migraine. However, if you are indeed suffering from the flu, this can intensify regular migraines. This is caused by the inflammation of the mucus membranes in the sinus and nasal cavities, which increases the pressure around the eyes and face.