how do i get rid of my stupid red cheeks!!!

i am 16 years old and for the past couple of years i have noticed i get very red cheeks!
when i am in a hot room, doing exercise, embarised or just even for no reason i have bright red cheeks, even when im not hot or or disstressed i have them! i realy hate them and they are haveing a masive affect on my confidence. some times i dont notice them but other time its like i have a red flush that can last up to 2 hours and i can feel my face burning up and i can feel them going reder and reder and i can feel the blood being pumped around them and when this is happening i just want to his and let no once see me bcaeuse i am so embarised because i feel i look like a burnig red fire!!! is there any thing you or any once alse can do for me, im desperate i will try any thing just to b rid of them for good they are affeting me masivley. thank you rhys