I have been hacking and spitting into Kleenex for many years. The need to spit or hack seem as though their is excess saliva in my mouth. It seems to flow more after eating, but I keep a box of Kleenex with me most of the time. I am a healthy senior who exercises 6 days of week, I eat healthy, I am at a healthy weight and all of the health numbers (weight, cholesterol, blood pressue,etc are very good). I take no medications, I am exceptionally strong for my age and I have excellent aerobic endurance. What might the need to spit or hack much of the day be caused by?