Capillary network of the hand
The principle of improving capillary circulation is to increase pressure slowly and release pressure quickly
1） 1)If you apply pressure slowly and softly on the capillary network
blood is pushed out to the venous side.
2）After resting for 1or2 seconds, if the pressure is released quickly,
arterial blood flows in from the arterial side.
The blood does not return because there is a venous check valve .By repeating this procedure, circulation in the capillaries is promoted.