Pain can be divided into nociceptive and neuropathic types of pain. Pain can be a mixture of these two types. Nociceptive pain: ☛ Caused by invasion and destruction of or pressure on superficial somatic structures like skin, deeper skeletal structures such as bone and muscle and visceral structures and organs. ☛ Types: superficial, deep, visceral ☛ Superficial and deep nociceptive pain is usually localized and non-radiating. ☛ Visceral pain is more diffuse over the viscera involved. Neuropathic pain: ☛ Caused by pressure on or destruction of peripheral, autonomic or central nervous system structures. ☛ Radiation of pain along dermatomal or peripheral nerve distributions ☛ Often described as burning and/or deep aching. ☛ May be associated with dysesthesia, hypesthesia, hyperesthesia and allodynia. ☛May also be accompanied by lightning like jabs of brief sharp pain (lancinating pain). https://web.archive.org/web/20200811025450/https://www.cpd.utoronto.ca/endoflife/Modules/PAIN%20MANAGEMENT%20MODULE.pdf