I am not going to suggest to you must avoid being stressed, after all it is part of being alive. With that said, you must learn to manage the stress effectively or your memory and health will be shot. If you have a high level of stress over a long period of time it can hurt your brain function in a major way. When you are stressed your body releases a hormone called cortisol.
The worst enemy to your memory or one of the worst is stress. When you are stressed you will not be able to focus and a lack of focus will kill your memory. When I trained for the USA Memory Championship I hired a former US Navy SEAL, TC Cummings. TC taught me a quote he learned in the SEALs, â€˜the more you sweat in times of peace the less you bleed in times of war.'