Flu is caused by a virus. It usually goes away by it self. Sometimes, complications develop such as bronchitis, sinus or ear infections, or pneumonia. Complications are serious for the elderly and for people who have chronic diseases like diabetes and heart disease. REST - go to bed and stay there until the fever has been gone at least 24 hours.
Bed rest is very important.
A cool, damp washcloth on your forehead may relieve the feverish feeling. Cold medications may help some symptoms. Antibiotics will not help the flu because viruses are not affected by antibiotics. Antibiotics are not necessary for flu unless additional complications occur. Your symptoms last for more than five days with no improvement.