According to yin yang philosophy the universe, and everything in it, is both constant and cyclical. One force dominates and then it is replaced by the opposing force. This activity continues constantly and repeats itself over time. Examples illustrating the philosophy of yin yang include:
Many people know the acupuncture point “Large Intestine 4,” or “He Gu,” can be used for treating headaches… but it is primarily effective for frontal headaches.