On the inner side of the arm, there are the acupoints of Shakuzawa, Kongmai, Liejiao, Taiyuan, Maijiao, Neiguan, Qiemen, Shaohai, and Tongli. There are six meridians circulating in the arm, including the three yin meridians of the hand (the Taiyin Lung Meridian of the hand, the Syncopal Pericardium Meridian of the hand, and the Shao Yin Heart Meridian of the hand), and the three yang meridians of the hand (the Yangming Large Intestine Meridian of the hand, the Sanjiao Meridian of the hand and the Sun Small Intestine Meridian of the hand). The meridian that runs on the inner side is the Hand San Yin Meridian. Acupuncture points on the inner side of the arm include points of the Hand Taiyin Lung Meridian (Taiyi Yuan, Lekou, Shakuzawa, Man Bai, Tianfu), points of the Hand Convulsive Yin Pericardium Meridian (Da Ling, Nei Guan, Mai Envoy, Qie Men, Que Ze), and points of the Hand Shao Yin Heart Meridian (Shen Men, Yin Qie, Tong Li, Ling Dao, Shao Hai, Qing Ling), and so on. It is recommended that acupuncture operations should always be performed by a professional acupuncturist to avoid causing bodily harm.