Usually headache is caused by either dehydration sleep deprivation Head exposure to cold e . g . running without head cover in the winter muscle tension in the neckToo low oxygen in the blood would likely make you dizzy together with or without a headache . <| sep |> I agree for 4 v 4 , but I think 1 v 1 and 2 v 2 have a lot more potential . They are very easy to track , and really come down to player skill . Plus , they are fun to look at . <| sep |> DS 3 feels identical to DS 1 . Just sped up and with some improvements from 2 brought over . You ' ll get used to the controls in 2 though . Believe me , I find it awkward and annoying every time I go back to 2 after spending time with 13 but if you just stick with it you ' ll get used to the differences and the game should play fine .