yeah. it helps equalize the pressure in both ears or something on the lines of that.
i know this because my moms uncle was the guy who discovered that balance is controlled by the ear and he did other sinus related research. he won a nobel prize, so i read up on him.
If you ear has been hurting for for a couple of days and won’t go away you might have an ear infection. It will not go away unless you get medication for it. It would be wise to get it checked out ASAP. You could get worse and even be an infection in the middle ear which will cause you to get dizzy.