Sudeck's atrophy, also called reflex sympathetic dystrophy syndrome and complex regional pain syndrome, is long-term pain, usually after a trivial injury.
Slipped disc (herniated nucleus pulposus) occurred when the centre of an intervertebral disc (a jelly-like substance) is forced through the outer casing.
Migraine is a severe, recurring headache which may cause visual symptoms (aura). They affect 12% of people, most commonly women, who often have triggers.