Laser directly irradiates on the lesion part where blood flow is decreased or irradiates the sympathetic ganglion which dominates this range. It supplies sufficient blood and nutrition to improve metabolism and relieve symptoms.

Laser irradiates the lesion area to enhance the activity of phagocytes and improve immunity, reducing inflammation rapidly.

The injured part can release substances similar to morphine after laser irradiation. It also reduces conduction rate, power, and impulse frequency to relieve pain quickly.

Laser irradiation accelerates the growth of new blood vessels and granulation tissue, improving protein synthesis. It organizes more oxygen supply to damaged cells and accelerates collagen fiber production and cross-linking.