Musculoskeletal pain is very common in the normal population, and the reason for about 50 % of the long term sickness absence in Norway. Most of these patients have common, but troublesome subjective health complaints where pathological findings are absent or substantially less than expected compared to the reported intensity of the complaints. Psychosocial factors are important in the development of chronic complaints. In a large meta-analysis job satisfaction was found to be associated with mental health and subjective physical health. Individual factors are also important. Uncertainty related to the understanding of pain mechanisms, treatment strategies and management contribute to the problem.