Headache
Headaches are quite common with flu infection, while some might not experience it at all. Flu-related headaches are severe and abrupt in offset, often starts within hours. You may feel persistent pain due to the swelling and inflammation of the sinus cavities to accommodate more Phlegm or mucus from the flu. A throbbing headache may be accompanied by other eye conditions like sensitivity to light, visual disturbances, and burning sensation and so on and makes you feel miserable. Luckily, these symptoms may go away in 1 to 2 weeks.
