One key chemical, called bradykinin, stimulates the nasal membranes to make runny, watery mucus and activates nerve endings in the throat, making it feel scratchy and sore.

• 其中，一种叫舒缓激（月太）(bradykinin)的重要化学物质能够刺激鼻黏膜产生鼻涕，刺激喉咙的神经末梢出现痛感。