Algolagnia

Algolagnia (/ælɡəˈlæɡniə/; from Greek: άλγος, algos, “pain”, and λαγνεία, lagnia, “lust”) is a sexual tendency which is defined by deriving sexual pleasure and stimulation from physical pain, often involving an erogenous zone.

Studies conducted indicate differences in how the brains of those with algolagnia interpret nerve input.