Extended data:
Spring refers to the period from beginning of spring to long summer in China lunar calendar, that is, January, February and March of the lunar calendar, including six solar terms: beginning of spring, Rain, Surprise, Equinox, Qingming and Grain Rain. Its climate is characterized by warmth and humidity.
When spring returns to the earth, the yang of nature begins to sprout and everything recovers, bringing a thriving scene. All living things in nature grow rapidly.
However, there are some harmful things, such as pathogenic microorganisms, bacteria, viruses and so on. , will also take advantage. All kinds of diseases and insect pests are rampant, which has brought great disasters to people, especially in southern China.
Nevertheless, spring is still the season that brings vitality to everything. When the natural yang begins to grow, "man corresponds to heaven and earth", at this time, the yang in the human body also conforms to nature and expands upward and outward.
Its physiological changes are mainly reflected in the following points:
1, which means that qi and blood activities are strengthened and metabolism begins to flourish.
2, it is the liver that governs spring, and the liver qi begins to flourish.
Due to the mild climate, people's outdoor activities are gradually increasing, so the blood stored in the liver flows to the limbs. In spring, with the warming of the climate and the increase of outdoor activities, people's spiritual activities begin to become active. These physiological changes put forward new requirements for diet and nutrition in spring.
References:
Baidu Encyclopedia-Spring, Summer, Autumn and Winter