I would not let it worry you. But if you are loosing sleep, or just dont' want to deal with it anymore. I would first consult a clergy member of your religion. If you don't really believe in that route or don't feel comfortable doing this, I would suggest Hypnotherapy.
Hypnotherapy works extreemly well on the sub-concious mind. I would say after a few sessions he wouldn't have these dreams anymore. Maybe even after one.
Dreams can be fixed very easily. Also if you consult a physician/therapist they will perscribe drugs. I would do this as a last resort, but its whatever rout you wish to take.
I hope everything goes well, and may you have good rest from here on.
