The connotation of "treat heat with cold" and "disperse fire constraint" differs， and under the guidance of these two principles， there are variations in the selection of acupoints， choice of needles， and manipulation techniques in clinical acupuncture. "Treat heat with cold" is used to clear and drain heat pathogens， while "disperse fire constraint" focuses on diffusing and dissipating fire from constraint. When both fire constraint and internal heat coexist， treatment should combine both "dispersing the fire" and "cooling the heat". In clinical acupuncture， for clearing heat and draining heat pathogens， acupoints on Governor vessel （督脉） and

Yangming

（阳明经） channel are commonly selected， with

Jing

-well points，

Ying

-spring points and

He

-sea points. To diffuse and dissipate fire constraint， acupoints on the

Taiyang

（太阳） and

Shaoyang

（少阳） channels are usually

chosen， with

Jing

-river points and

Ashi

points as the primary options. In terms of needle choice， for heat syndrome， filiform needles， three-edged needles， and cupping are often used for clearing heat and resolving toxins； for fire constraint syndrome， moxibustion and fire needles are employed to expel fire from the body. Regarding manipulation techniques， draining method can be used in both conditions， with heat syndrome requiring shallow needling and quick removal， while fire constraint syndrome requiring deeper and longer retention of needles， having an emphasis on hand pressure coordination and smooth

qi

flow. In clinical practice， it is essential to distinguish the presence of "constraint" and the depth of the disease location to appropriately combine "dispersing fire" and "cooling heat".