Prevalence of primary headache related to work activity in a group of temporomandibular disorder patients.

Since headache is one of the most frequent complaints in temporomandibular disorder (TMD) patient, its burden in terms of the both social cost and individual sufferance is considerable. Headache is a frequent cause of absence from work and decreased productivity. This study was aimed at identifying specific occupational factors able to modify the prevalence of headache in a group of TMD patients.