The exact location of Zhi Yin is on the lateral side of the end section of the fifth toe, 0.1 inches behind the lateral side of the corner of the nail root, and its main function is to improve the symptoms of headache, eye pain, nasal congestion, etc., and to treat malposition of the fetus and difficult labor. Zhi Yin is the name of the acupoint, belonging to the foot solar bladder meridian. It is located on the lateral side of the terminal section of the little toe of the foot, 0.1 inch from the root angle of the toenail, that is, 0.1 inch from the root angle of the fifth toenail on the foot. Shallow stabbing treatment of Zhi Yin can improve symptoms such as headache, eye pain, nasal congestion, as well as malpositioned fetus and stagnant labor. Zhi Yin is also a frequently used point in Chinese medicine. Acupuncture should be performed by a medical professional and moxibustion should be performed under the guidance of a doctor. It is important to choose the right acupuncture point under the guidance of your doctor for your individual condition.