My eyes are always red..?

My eyes are always red and its so annoying. I have no idea why. Theyre blood shot all of the time and I get teary eyed for the dumbest reasons. I also always cry and its totally involuntary. If Im mad or cough or yawn or anything I start to cry. How can I become less emotional all the time and make my eyes less red? I dont wear contacts or anything. I wear heavy black eye makeup. Ive worn color contacts but I have perfect vision, whats wrong with me?