Another set of mechanisms, known as pain inhibits pain, is what allows the discomfort of nails digging into palms to alleviate the pain of a dental drill being used on teeth.

另一种机制被称为“疼痛抑制疼痛”， 它可以让指甲陷入手掌的不适感减轻在牙齿上使用牙钻的疼痛。