Most popular way to decide the treatment side is that if the patient is a female, the treatment side is right side of the body, and if the patient is a male, the treatment side is left side of the body. At the same time, as confirmation, checking both sides of the navel (KD15 area), harder side is chosen as the treatment side. However, even if the gender and side of the navel show right side of the body, sometimes I can't find a good meridian and a point to tonify Yin on the right side of the body. When gender and the harder side of the navel conflict, if I choose the harder side of the navel, it doesn't go well sometimes. So how can I find proper treatment side? I will talk about my idea next time.