Why do some people's skin colors change with the weather?

People's mood is easily influenced by the weather.

When the sun is shining, people will feel happy and happy inside; On rainy days, many people will shout that they are depressed; When the weather is hot and dry, people feel restless, in a word. The temperature and humidity of the weather will affect people's mood, and then affect the secretion of some glands, leading to emotional fluctuations, and emotional changes are inevitable.