When pain is a signal for something else.
Some time ago I worked with a lady suffering from migraine.Although as we talked before we started the real work it became apparent that before the migraines she used to suffer from recurring back ache. Being a successful business person this would not stop here working many hours and dealing with high levels of stress. Having gone to a chiropractor and used other pain relieving drugs she overcame the pain only to find headaches came next. Still she persisted, work came first