A contraction pressure of 100 mmHg is equivalent to a high grade of pain and cannot be accurately rated as everyone has a different tolerance for pain. Contraction pressure is the pressure of uterine contractions detected by the probe, and is usually measured when regular contractions occur. The stronger the uterine contractions, and the closer they are to full opening of the uterus, the more pronounced the contraction pressure will be. When the uterine contraction pressure reaches 100mmHg, it generally belongs to the period of labor when the mouth of the uterus expands faster or when the head of the delivery is approaching, and at this time, the pain reaches a high level, which belongs to the high level of severe pain that is difficult to be endured by the general public. In the process of labor, we should ensure emotional stability, contractions should be in accordance with the doctor’s instructions to the correct force, in order to give birth to a smooth delivery, but also to avoid causing perineal lacerations.