Eli5: why do people’s elbows not hurt when pinched, but do hurt if cut or scraped?


I noticed that if I pinch my elbow it doesn’t hurt or anything and I can barely feel it. However, I also scraped my elbow on the corner of the wall while passing it quickly and that sucker hurts like hell. What’s the reason for this?

In: Biology

The elbow skin has lower nerve content so you small stimuli like punching are not enough to cause pain. For that you need a bigger stimulus like the skin being damaged when you scrape it for example. For more detail, there are different types of nerve endings and sensors, the proportions of these different types of sensors can also vary in different parts of the body leading to different sensation patterns.