Pain reaction is always related to unhappy emotion(such as aversion and horror),then create behaviors such as retraction,escape and opposition,meanwhile,cause complicated physiologic function changes.

• 疼痛反应总是与不愉快的情绪相关联(如厌恶、恐惧等),继而使人产生退缩、逃避、反抗的行为,同时引起体内复杂的生理功能的变化。