The Yellow Emperor asked: Today's fevers are all exogenous cold, which belongs to typhoid fever, but some people will die and others will live. Those who died died within 6 or 7 days, and those who survived were cured after 10 days. What is the reason? I want to hear your opinions.

Qi Bo said: The sun meridian is the first of the six meridians, and all the yang meridians of the human body belong to it. The meridians of the sun are connected with Fengfu and intersect with Du Meridian and Yangwei. Because du meridian has the function of controlling the yang meridian and qi of the whole body, the sun is the main qi of yang and the exterior and interior of the whole body.

People will have a fever when they feel cold evil. Although the fever is serious, it usually won't die. If yin and yang meridians feel cold evil at the same time and get sick, they will definitely die.

The Yellow Emperor said: I want to know more details.

Qi Bo said: On the first day of typhoid fever, the sun meridians first attacked. Because the sun dominates the outside, there will be symptoms of head and neck pain and stiff muscles in the waist and spine. The next day, pathogenic factors invaded Yangming Meridian, because Yangming main muscle and foot Yangming Meridian went up with the nose, around the eyes and down to the abdomen, so there would be symptoms of body heat, eye pain, dry nostrils and insomnia. On the third day, shaoyang meridian came up, and shaoyang dominated the bone. Because the meridians of shaoyang foot run around the flank and wrap around the ear, there will be symptoms of chest rib pain and deafness.

If all the meridians of Sanyang are involved, but the pathogenic factors have not penetrated into the five internal organs, they can be cured by sweating.

On the fourth day, the lunar sutra came up. Because the foot Taiyin meridian acts on the stomach and collaterals the throat, there will be symptoms of abdominal distension and dry throat. On the fifth day, the Shaoyin Meridian came up, because the Shaoyin Meridian of the foot runs through the collaterals in the kidney and lung and even the root of the tongue, so there will be symptoms of dry mouth and thirst. On the sixth day, pathogenic factors reach Jueyin Meridian, and the Foot Jueyin Meridian circulates in the yin organ and wraps around the liver, so there will be symptoms of depression and scrotal contraction.

If Yin San meridian, Sanyang meridian and five zang-organs are all diseased, Wei Rong's qi and blood can't circulate, and the qi of five zang-organs can't circulate, people will die.

If it is not the disease caused by the cold and evil feelings of Yin and Yang at the same time, by the seventh day, the disease of the sun will be attenuated and the headache will be slightly improved; On the eighth day, Yangming disease will be weakened and body heat will be slightly reduced; On the ninth day, shaoyang disease weakened, deafness also eased, and hearing could gradually recover;

On the tenth day, the disease of Taiyin will decline, the symptoms of abdominal distension will subside, and I really want to eat; On the eleventh day, the disease of shaoyin was relieved, the mouth was not thirsty, the tongue was not dry, and sneezing was allowed; On the twelfth day, the disease of Jue Yin will decrease, the scrotum will relax, and the urgency of the lower abdomen will be alleviated. At this time, the great evil has subsided and the disease has healed.