Dopamine is secreted during excitement. Dopamine is part of a brain secretion that is used to help cells transmit impulses that can affect a person’s mood. This secretion in the brain is mainly responsible for the brain’s desires and sensations and transmits messages of excitement and happiness, and has also been linked to addiction. When people are excited, the brain secretes dopamine. When people feel happy when something exciting happens to them, there is an increase in the secretion of the neuromodulatory substance acetylcholine in the brain, blood flow, dilation of subcutaneous blood vessels, and a smooth flow of blood to the skin, which leads to a radiant glow and gives a feeling of energy and confidence. When people are overly stressed and depressed, too many catecholamines are released in the body, increasing the secretion of adrenaline and constricting the small arteries, resulting in a sudden decrease in the blood supply to the skin, leading to a pale or yellowish complexion. In case of depression, you can consider adding some appropriate physical activities, such as swimming and yoga, which can increase the secretion of endorphins and achieve the effect of regulating the function of the nervous system.