I don't have any detrimental physical effects that are caused from vampirism, except of course the severe fatigue which we all suffer from when we are unable to feed regularly. I have sun sensitivity but its caused from other things like medications I take and other health related issues.
I sometimes wonder to myself about cause and effect. I wonder is my vampirism caused by my other illnesses or sometimes I wonder if the other illnesses I have (migraines, chronic anemia, sun sensitivity etc) are because of my vampirism. I usually turn the thoughts regarding this issue around and around my head for a few days before coming to the conclusion that they are separate things. They react to each other of course but its like having the flu when you have a broken leg. It will make you feel worse but you didn't catch the flu because you had a broken leg.
Amanda