I Seem To Have A Head Cold And/or A Sinus

I seem to have a head cold and/or a sinus infection. I have congestion, stuffy nose, itchy eyes and sensitivity to light. My main question however is about a bump I have on the roof of my mouth. It starts behind my front teeth and runs toward the back in a straight line. I have gotten these most of my life but I do not know what it is or what it is caused by. It bothers me to know it's there and it is somewhat painful. I would appreciate any insight into what this is. Thank you.