According to the five elements theory of traditional Chinese medicine, sleepiness is mostly caused by spleen-yang deficiency and qi deficiency. The liver in the five elements belongs to wood, and the spleen in the five elements belongs to soil. Excessive growth of liver qi in Muketu in spring will lead to excessive cough due to spleen deficiency and insufficient yang for a long time, which will make people sleepy.

Explain the "spring sleep" in TCM health preservation. There are four seasons in a year and four seasons in a day. 3: 00-9:00 am is a spring day, and people's yang begins to grow at 3:00 am in the early spring of the day.

If in the other three seasons, Yang will not grow at three in the morning, but in spring, it will grow at three in the morning. At this time, you should get up and exercise, so that Yang Can can rise smoothly and feel refreshed in one day. However, people seldom get up at three o'clock in the morning, so the sun be the spirit is suppressed, and people will lose their spirits all day. Only in spring will the yang grow so early, so it is easy to get sleepy in spring, because the yang does not rise.

There is another explanation for "spring sleep", but only for a few people. Spring is the time when the liver grows, and some people's liver qi will flourish because of excessive hair growth. Such people are prone to insomnia, dreaminess and poor sleep quality, so they feel sleepy every day.

This is my answer to your question. Thank you.