When a woman is approaching labor, her body hormone level changes, causing the uterus to gradually change from irregular contractions to regular contractions. The strong contraction of the uterine fibers, the sudden increase of pressure in the uterine cavity and the pressure on the uterine vessels are stimulated to the nociceptive center of the brain, thus causing severe pain to the mother. The pain is caused by the pressure of the fetus on the birth canal, especially the lower part of the uterus, the cervix, the vagina and the perineum, which causes damage and strain. Maternal tension, anxiety and fear can cause a series of neuroendocrine reactions in the body, which can intensify the pain. Due to individual differences, each person’s tolerance and perception of pain is also different. On the medical pain index, labor pain is ranked second only to burning pain. According to statistics, about 44% of first-time mothers feel unbearable pain in childbirth, even to the point of “unbearable pain”, which is one of the most intense pains most women experience in their lifetime. However, some people feel that labor pains are not as unbearable as they think, as the uterus contracts in bursts during labor, and the mother feels a burst of abdominal and lumbosacral distension and discomfort.