In general, laser is applied for the purpose of antiphlogistic as well as pain suppresion. In this study of helium-neon-laser-light, we performed a double-blind trial on 120 patients with neck shoulder pain and tension type headache.According to Wilcoxon certification, comparing the patients of before and after the clinical trial, positive effect of the nelium-neon-laser-light was ascertained in active group.As a result, the helium-neon-laser-light was verified to have such functions as improvement of blood circulations, enzymatic activation as well as tissue restoration. These functions are the contributing factors for attenuation of the pain caused by injury in peripheral nervous system.
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