Note that less than these instances there is usually pain possibly without any stimulus or with an incredibly gentle, non-tissue-harmful stimulus. It can be crucial to indicate that (one) there can be pain with no exercise in primary afferent nociceptors, and (two) there could be activity in primary afferent https://bookmarklinx.com/story18102955/how-much-you-need-to-expect-you-ll-pay-for-a-good-what-are-pain-receptors