If you've taken medication for the headache and the headache still doesn't want to go away you can try placing a warm towel around your neck and base of your skull which can help relieve tension headaches.
You can also place a heating pad around your neck and the base of your skull to get the area warm to get rid of the headache.
Also try massaging your neck and temples which can usually relieve a headache and be sure to get plenty of rest.
Another thing you can try to get rid of a headache is to place an ice pack on your forehead.
You can take some ice cubes and wrap them in a towel to use as an ice pack as the cold can help relieve the pain from a headache.
If your headache still won't go away then you should see a doctor to rule out anything more serious.