It definitely helps the doc. I go see my doc once every 3 months so showing him this allows him to monitor how I've been between visits. I forget things really fast too so for both of us this helps immensely. It helps to see if I need a change in meds as well. My doc is pretty awesome and loved the fact that I keep track of myself like this. It really helps that I have kept a journal pretty much my whole life.

LOL This just became another type of journal.
Hugs,
Karen