Stress causes a chemical response in your body that makes skin more sensitive and reactive. Cortisol, the stress hormone released in your body when a stress response is triggered. This can exacerbate skin conditions as well as other body conditions you might be suffering from.
How does cortisol directly affect skin?
Once the bodies stress response is triggered and cortisol starts being produced, a message is sent to your skin to increase its' oil production. Once the skin produces more oil than required, this can lead to breakouts, congestion, as well as exacerbate skin conditions like rosacea and psoriasis.