Stretching can cause systemic large local muscle shortening, the stasis of blood was "catch" back to the heart, and then greatly increase blood flow, improve blood circulation.

The model of rats cirrhosis with portal hypertensive stasis is used to explore the change of tongue inspection in relation to the pressure of deep lingual vein; portal vein and portal blood flow.

Conclusion Partial pain point selection along with acupuncture, can dissipate the local stasis of blood, smooth the meridian patency, achieve tension, improve blood flow and relieve pain.