<prompt> In Raynauds disease true is :a Lower limb more involved than commonly upper limbb More common in femalec Sup. thrombophlebitisd Associated with migrainebddabac  <response>: Raynauds diseaseThe diagnosis of Raynauds ds. is made when the secondary causes of Raynauds phenomenon are ruled out.Over 50 of pts. with Raynauds phenomenon have Raynauds ds.Ds. is more common in female M : F ratio is 1 : 5Age of presentation - 20 to 40 yrs.Fingers are involved more frequently than toesRarely earlobes and tip of the nose may be involvedRaynauds phenomenon occurs frequently in patients who also have migraine headaches or variant angina. These associations suggest a common predisposing cause for the vasospasmOn physical examination the pts. are often entirely normal. The radial, ulnar and the pedial pulses are noinial.Sclerodactyly thickening and tightening of the digital subcutaneous tissue may develop in few pts.In general, pts. with Raynauds disease appear to have a milder form of Raynauds phenomenon. Fewer than 1 of these patients lose a part of digit. 