Toothache is more painful compared with giving birth to a child. When the tooth forms deep caries, it can produce sharp pain when it is stimulated by cold, heat, acid and sweet, which lasts for a short time and can be relieved by itself. When acute attack of pulpitis or periapical inflammation occurs, it can cause obvious pain on the same side of the head and face, which can last for several minutes to an hour or so, but it does not affect the whole body. The passage of the baby through the birth canal can squeeze the pelvis during childbirth, causing a continuous cracking of the bones and resulting in severe pain throughout the body. In some women with difficult deliveries, the pain can last for more than 10 hours and can even be life-threatening. Compared to toothache, the pain of childbirth is more intense.