In spring, it is important to raise yang, so we must first abide by the principle of "raising yang in spring and summer" proposed by Huangdi Neijing. How to maintain yang in spring? Method 1: Invisible evil steals the wind, and sometimes avoids it to protect the sun. It is clearly pointed out in Huangdi Neijing that "virtual evil steals wind, so it is sometimes avoided", which means common cold. Anything that can make people sick should be avoided in time, which is especially important in spring. Careful "sugar friends" will realize that if you do morning exercises in the strong wind in spring, your blood sugar will definitely rise. Method 2: Live yang. When spring returns to the earth, the yang of the human body begins to tend to the outside, the skin gradually stretches, the blood supply on the muscle surface increases, and the limbs are sleepy, commonly known as "spring sleep". Therefore, it is known as "I wake up at dawn and birds sing around", which often makes me three feet tall and sleepy. However, staying up late is not conducive to the growth of yang. Therefore, sleep time should be controlled. In daily life, it is required to lie flat at night, get up early, wear no hat, relax clothes, stretch your body, and walk slowly in the courtyard or venue to overcome emotional fatigue and drowsiness, so as to help yang rise.