Cupping effect:
1. Purple-black and dark: generally indicates insufficient blood supply, poor menstruation and blood stasis
2. Purple with plaques: generally means cold blood stasis syndrome
3. It looks like scattered purple dots, and has different shades: it means qi stagnation and blood stasis syndrome
4. Bright red and bright: generally means yin deficiency, qi and blood deficiency or yin deficiency and fire
5. Red and dark: means high blood lipids and heat evil
6. Grayish white: touch but not warm, mostly cold and wet
7. There are dermatoglyph or micro-oxygen on the surface: it means wind evil or dampness
8. Moisture on the inner wall: it means there is moisture in the part
9. Blisters appear: it means that the body is humid. If there is blood in the blisters, it is a reaction of damp heat and poison.