Located in the palm of the hand, at the first metacarpal bone, from the root of the thumb of the hand, ending at the root of the palm of the hand. In traditional Chinese medicine, there is an acupoint on the big fish head called Yuzhi point, which is the Xing point of the hand Taiyin Lung meridian, has the effect of clearing the lungs and draining heat, facilitating the pharynx and relieving pain, and is often used in treating the lungs with solid heat conditions such as coughing, hemoptysis, dryness of the pharynx, sore throat, loss of voice, etc. It can also treat palm pain, heat in the palm, and pediatric chancre (a kind of chronic disease in children). It can also be used to treat pain in the palm of the hand, heat in the middle of the palm, and pediatric noma (a chronic disease of children, manifested by emaciation, abnormal diet, abdominal distension, and thinning and yellowing of hair, etc.), which is one of the commonly used acupoints in clinical practice. Generally, operations on the Great Fishbone include acupuncture, tuina, gua sha, moxibustion, and so on. If you need to operate on the Great Fishbone, you should go to the hospital to be clearly diagnosed and operated by a doctor, and should not operate blindly on your own, so as not to cause adverse effects on the body.