Presence or absence of any coexisting noncutaneous conditions was established. Three patients were hypertensive, three had psoriatic arthropathy, one had hepatitis C virus (HCV) with anaemia of chronic disorder type and one had diabetes mellitus with hypertension. A positive family history was encountered only in one case. Two patients had upper respiratory tract infections; cold exposure worsened five patients' clinical presentation; sweating aggravated one patient's condition; three patients had psychogenic factors precipitating their cases. Only five of the studied patients were not affected by predisposing factors (31.3%).