livedo reticularis

Question 1

what is it?

Answer 1

an purplish, non-blanching, reticulated rash caused by obstruction of the capillaries resulting in swollen venules.

Question 2

causes

Answer 2

idiopathic (most common)
polyarteritis nodosa
systemic lupus erythematosus
cryoglobulinaemia
antiphospholipid syndrome
Ehlers-Danlos Syndrome
homocystinuria