We prospectively studied 47 consecutive patients with either seasonal or perennial allergic rhinitis or non allergic rhinitis in a general allergy clinic. A diagnostic questionnaire was administered Jor symptoms oj rhinitis and fibromyalgia, and patients were examined for tender points. A history of congestion was present in 91%, rhinorrhea in 87%, and postnasal drip in 83%. Forty-nine percent had a history of diffuse, aching pain. or tiredness Jor at least 3 months; 49% percent had 11 or more tender points; and 38% had both a history of widespread pain plus 11 or more tender points (the 1990 criteria oj the American College oj Rheumatology for fibromyalgia). This frequency is much higher than the expected 4 to 5% prevalence of fibromyalgia in a general population. Seventynine percent of all subjects were skin-test positive to inhalant allergens, but positive skin tests alone did not correlate with. the number of tender points or criteria for fibromyalgia. Rhinitis. rather than atopy, is associated with fibromyalgia and may be an underdiagnosed, but important causative factor.