What cause the palms of some ethnic group to stay red adjectives the time?

What cause the palms of some ethnic group to stay red adjectives the time?
This is usually in association next to blood circulation problems and autoimmune disease. Possible Reynauds.
Palmar erythema (red palms)
http://en.wikipedia.org/wiki/palmar_eryt... (linked to liver dysfunction (esp. portal hypertension, eczema, psoriasis, high estrogen levels)
http://www.diseasesdatabase.com/result.a... (linked to liver anticlimax, high estrogen states, pregnancy, hyperthyroidism, rheumatoid disease)
http://www.gpnotebook.co.uk/simplepage.c... (liver diseases and conditions, pregnancy, thyrotoxicosis (hyperthyroidism), rheumatoid arthritis, polycythema (blood disorder), leukemia (blood disorder), shoulder foot syndrome (This is a form of reflex sympathetic dystrophy that may affect the feet or hand after an injury.), high estrogen level.
http://www.medscape.com/viewarticle/5277... (scroll down to palmar erythema)"Red palms are often due to states that increase the amount of circulating estrogens. Three percent to 5% of the ordinary population has red palms. Conditions producing palmar erythema include cirrhosis (liver palms), alcoholism, hyperthyroidism (erythema and sweat), diabetes mellitus, vitamin B not as much as, beriberi, rheumatoid arthritis, polycythemia rubra vera, and tuberculosis."