I would say that stress does play a role, because whenever I'm stressed out that's when I notice acne appear. Idon't know if it's oil or whatever, but I do know that stress is somehow connected to your skin and acne.
I have had a lot less pimples since I started using a product called Face Doctor Rx. It's pretty much natural and is the only product that has ever worked for me.
To read my blog about it, which includes ingredients and everything you want to know about it, go to:
This Stuff Cured My Acne.
Sabrina