I am 17 and lately after my sports practices my face is only red on one side(my left). When I work out during the practice as well it becomes only red on that side. After for about 2-5 hours I have pain right above my left eyebrow, and when I take a shower if water gets on it during that time period it becomes very painful. Is this a problem with my sinuses, and do i need to get it checked out or is it just a normal thing?