Hi Jerry - I got to ask my ENT about this and although I don't remember if he specifically mentioned the parotid gland, he did say that this symptom is probably nerve damage from the radiation. Something like the body is calling for saliva and because of nerve damage, the sweat glands respond instead. Thanks for your response and the info about gustatory sweating. I sweat across the entire forehead, not only on one side. However, I am also diabetic so maybe that's part of the problem. Thanks again.