nociceptors – MySymptom

Why do my minor shallow paper cuts sting and burn when I accidentally sweat on them?

1. Introduction Minor shallow paper cuts sting and burn when exposed to sweat because the sodium chloride and slightly acidic pH of the perspiration directly irritate exposed sensory nerve endings in the epidermis. A paper cut slices cleanly through the superficial skin layer, leaving microscopic nociceptors completely unprotected from the harsh chemical composition of the … Read more

Why do tiny paper cuts sting ten times worse than a regular deep knife cut?

1. Introduction Tiny paper cuts sting disproportionately more than deeper, regular knife cuts due to a convergence of neuroanatomy and microscopic physics. The injury occurs almost exclusively on the fingertips, an area endowed with the highest density of superficial pain receptors in the human body. Furthermore, the mechanics of a paper cut differ significantly from … Read more