The Change in Cutaneous Temperature When Using Acupuncture at TB-3 and BL-65 Acupoints in Healthy Participants

For more than 2,500 years, traditional medicine, especially acupuncture, has been widely used in health care and recognized by the World Health Organization (WHO) to manage various diseases. Besides, many molecular biological mechanisms of acupuncture in pain management have been elucidated. Acupuncture is a safe, effective, and cost-effective therapy, reducing the overuse of opioid pain relievers. In neck pain treatment, many clinical studies used remote acupoints, which have specific effects on the neck. Among them, the Stream points in the Five Stream acupoints system are the most used acupuncture points in the treatment of neck pain. However, the relationship between these acupoints and the neck has not been proven. The goal of this trial is to compare the change in skin surface temperature at the neck and the cutaneous zone before and after using acupuncture at the control acupoint (SP3) and two research acupoints (TB3 and BL65) in healthy volunteers. The main questions it aims to answer are: * Whether the Zhongzhu and Shugu acupoints change the skin temperature in the neck area? * How does the change in temperature correlate with the cutaneous zone distribution of the Shaoyang and Taiyang meridians, respectively?