In various studies, the incidence of fibromyalgia in Behçet's patients is widely distributed. It was aimed to investigate the frequency and severity of fibromyalgia in Behcet disease in province Bursa.

There are few studies in the literature investigating the frequency of fibromyalgia in Behçet's disease. In various studies, the incidence of fibromyalgia in Behçet's disease was 5.7% -37.1%, which is widely distributed. There are no studies in literature comparing disease severity and pain thresholds at trigger points in fibromyalgia with and without Behcet's disease. In this study, it was aimed to investigate the frequency of fibromyalgia in Behcet's disease according to the criteria defined by the American Colloge of Rheuatology in 2010 and updated in 2013. It was also aimed to compare the severity of disease in fibromyalgia with and without Behcet's disease.

Inclusion Criteria:

• Patients diagnosed with Behcet disease according to international study group criteria
• Patients diagnosed with fibromyalgia according to classification criteria that were defined by the American Collage of Rheumatology in 2010 and updated in 2013
• Patients older than 18
• Patients younger than 75

Exclusion Criteria:

• Participants which were previously diagnosed with diabetes mellitus
• Participants which were previously diagnosed with chronic renal failure
• Pregnant women

Study population consists of participants who are between age 18-75, not pregnant and who were not diagnosed previously with diabetes mellitus or chronic renal failure