As a component of your autonomic nervous system, the parasympathetic nervous system is involved. You may refer to it as your "automatic" nervous system because it controls a lot of the processes that you don't have to think about. In addition to other bodily processes, this may involve managing your heart rate, blood pressure, digestion, urine, and perspiration.
Your sympathetic nervous system and parasympathetic nervous system work together to maintain equilibrium in your body. Your parasympathetic nervous system assists in regulating your body's reaction while you are at rest, whereas your sympathetic nervous system is in charge of controlling your body's "fight or flight" response.