Can X-rays hurt you?

[JoeB]

I work for a dentist, and one of my jobs is to arrange the x-ray film in the patients mouths. My boss lets the patients wear these lead aprons, but when we have a patient that has a problem with the films (a lot of kids can't keep them straight in their mouths) he insists that I hold the film straight. He tells me that the x-rays are aimed at the mouth, so I don't have to worry, but I've been noticing a lot of my hair is coming out when I brush my hair. Should I quit? Should I go to a worker's comp doctor?