Explain in detail why cupping can firmly "stick" to the skin.

It's not a complete vacuum, but a negative exhaust pressure-due to the thermal expansion of the air in the bottle, some air is exhausted, the air density in the bottle is reduced, the bottle mouth is sealed by the skin, the alcohol cotton ball is extinguished due to lack of oxygen, the air temperature in the bottle is reduced and contracted, and the pressure in the bottle is lower than the outside world, so the air in the bottle cannot be "pressed" on the skin by atmospheric pressure. The skin covered in the bottle also bulges due to the pressure drop in the bottle.

Cupping, like acupuncture, is also a kind of physical therapy, and cupping is one of the best physical therapies.

Cupping promotes blood circulation, stimulates essence and regulates qi and blood through physical stimulation and negative pressure, thus improving and regulating human immunity.

Of course, cupping is not as accurate as acupuncture, mainly because of the combination of points, lines and surfaces. Through the distinction between cold and heat deficiency and excess in traditional Chinese medicine, select some parts where meridians pass or qi gathers.

Cupping is a unique therapeutic method, which has been circulated among the people in China for a long time. It is usually called cupping and suction. It is called cupping qi in Compendium of Materia Medica and cupping method in authentic surgery. In ancient times, it was mostly used for surgical carbuncle. At first, it was not a jar, but a horn tube with a small hole was used to suck pus in the affected area, so it was named "horn method" in some ancient books. The earliest written record of cupping therapy is The Elbow Queen written by Ge Hong in Jin Dynasty from 28/kloc-0 to 36 1.

Later, the horn tube was gradually replaced by bamboo pot, pottery pot and glass pot, and the scope of treatment also expanded from early surgical carbuncle to rheumatic pain, back muscle strain, headache, asthma, abdominal pain, traumatic congestion, common rheumatic cold and various pains.

Cupping is a kind of hyperemia therapy, which uses heat to exhaust the air in the jar to form negative pressure, so that the jar can be tightly sucked at the treatment site, resulting in hyperemia, thus producing therapeutic effect. China people call it blood stasis therapy. Because this method is simple and effective, it has been used so far in folk dynasties and has never failed. Even some foreigners are interested.

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Principle of cupping

"Cupping" is a treatment method of Chinese medicine, which can help people to treat some physical pains. "Cupping" means putting a lighted alcohol cotton ball in a bottle. After the alcohol cotton ball burns for a period of time, the bottle is immediately illuminated on the affected area, and the bottle will immediately "stick" to the skin. At the same time, the alcohol cotton ball in the bottle will go out and the skin covered in the bottle will swell up. This is because the air in the bottle is heated and expanded, and part of the air is discharged, so that the air density in the bottle is reduced, the bottle mouth is sealed by the skin, the alcohol cotton ball is extinguished due to lack of oxygen, the air temperature in the bottle is reduced and contracted, and the pressure in the bottle is lower than the outside, so the bottle is "pressed" on the skin by atmospheric pressure and cannot fall off. The skin covered in the bottle also bulges due to the pressure drop in the bottle.