疼痛是一种自身保护信号,对人体具有保护作用,使人体采取措施避开或去除造成疼痛的因素。引起疼痛的因素有物理因素(如高温、过冷)、化学因素(如各种药物中毒)、全身性疾病(如:尿毒症)、神经系统疾病(如肿瘤等)。身体内有许多“疼痛感受器”,当接到疼痛的信号后,便通过神经的各种“路线”,传至人体的“最高司令部”——大脑,“司令部”下达指示后,人体便产生了痛觉。 Pain is a self-protection signal that has a protective effect on the human body and allows the human body to take measures to avoid or remove the pain-causing factors. Factors that cause pain are physical factors (such as high temperature, too cold), chemical factors (such as various drug poisoning), systemic diseases (such as uremia), nervous system diseases (such as cancer, etc.). There are many “pain receptors” in the body. When they receive a pain signal, they pass through various “routes” of the nerve to the “Supreme Command” of the human body - the brain. After the “Command” gives instructions, the human body Have a pain.