疼痛是正常感觉的感性体验。通常描述由什么所引起的感觉没有问题,例如,不同的表面或压力。然而难于描述疼痛刺激的特性。人在前额部接受持续一定时间的辐射热的刺激而感到疼痛,这种疼痛可被描述成“痒”或“针刺样痛”或“有东西烧我前额”,无人给以精确的描述,但总是有疼痛的报道。 Pain is a normal sensation of sensual experience. Often, there is no problem with what the sensation is caused by, for example, a different surface or pressure. However, it is difficult to describe the characteristics of painful stimuli. A person feels pain in the forehead subject to radiant heat stimulation that lasts for a certain period of time. Such pain can be described as “itchiness” or “acupuncture-like pain” or “there is something burning my forehead,” with no precise description But there is always painful coverage.