In traditional Chinese medicine theory, human health is regarded as closely related to the balance of qi and blood. Qi and blood, as essential elements for maintaining normal physiological functions in the human body, play a crucial role in various life activities within the body.

Traditional Chinese Medicine believes that Qi and blood in the human body are like natural sunlight and rain, and are the source of life. The existence of qi enables life activities to occur, driving the growth, development, and metabolic processes of the human body. And blood, like the soil of life, provides nutrition and nourishment for all parts of the body, allowing the body to function normally.

However, once the circulation of qi and blood is not smooth, like the retention of sunlight and rain, the life activities of the human body will be seriously affected, like the decrease in soil fertility, leading to various diseases in the body. When the circulation of qi and blood is obstructed, the meridians are blocked, and various parts of the body cannot receive sufficient nutrition and energy, the normal functions of the body will gradually become imbalanced, resulting in various symptoms.
在中医理论中，人体的健康被视为与气血的平衡息息相关。气血，作为维持人体生理功能正常运作所必需的元素，担任着身体内各种生命活动的关键角色。

中医认为，气血在人体内如同自然界的阳光和雨露，是生命的源泉。气的存在，使得生命活动得以发生，推动着人体的生长发育和代谢过程。而血，则如同生命的土壤，为身体各部分提供营养和滋润，使得机体得以正常运行。

然而，一旦气血流通不畅，如同阳光雨露的滞留，人体的生命活动将受到严重影响，犹如土壤肥沃度的降低，使得机体出现各种疾病。当气血流通受阻，经络被阻塞，身体各部分无法得到足够的营养和能量，机体的正常功能就会逐渐失调，从而产生各种症状。