What Causes Redness In The Eye?

Hi, my right eye has been bloodshot now for over a month. This really only affects the inner corner - the veins are very red and noticeable and a sort of pink / red area has gathered around my iris. Some days it seems slightly worse and others slightly better, but in general it is not improving. There is no major pain or discomfort, although sometimes I have found it to be slightly itching and watery and other times dry. I have not really felt any pain, although the last couple of days I have felt slight pain now and again, although I'm not sure if I have imagined this. I also have the slight sensation of fuzziness / pressure in that eye, but once again really nothing major. I am 31, do not wear glasses, and rarely have eye problems, and have never had this problem before. Any advice or idea what the problem is? Thanks