Lisa, there's 2 kinds of hair loss. One is from the chemo and that hair will grow back. The second is from the follicles directly in the radiation field. The follicles actually die and fall out. The hair will not regrow there except fot a few stragglers here and there. I never have to shave my neck and that's 360 degree's. My hair loss wasn't symetrical either. Like 1/2 of my moustache fell out - but it grew back. Neither my wife or I can remember when this all started but I can remember smelling like a toxic waste factory from the Cisplatin for several weeks post Tx.