Acrocyanosis is undoubtedly the most commonplace acrosyndrome, both in term
s of pathogenesis and prognosis. Patients experience functional impairment
and an esthetic prejudice that must not be neglected. Adopting the nosologi
cal classifications described for Raynaud's syndrome, primary acrocyanosis
must be distinguished from exceptional secondary phenomena that have a radi
cally different clinical course. Primary acrycyanosis is generally observed
in a youngs women who appears thin or has recently lost weight. No paroxys
mal episode (syncope, cyanosis, suspicious event involving the fingers) is
found. The physical examination is negative and no complementary exploratio
ns are needed. Current pathophysiological hypotheses remain insufficient bu
t suggest that vasopasticity rather than hemorheology is involved. The hypo
thesis that a thermoregulation disorder could be associated with weight los
s deserves further study. Symptomatic care relies on dietary and hygiene co
unseling, emphasizing the importance of warm clothing. The psychological el
ement must also be considered even in the most common forms.