Blue skin may refer to:
Argyria, a condition caused by the ingestion of elemental silver, silver dust or silver compounds Methemoglobinemia, the presence of excessive levels of methemoglobin in the blood Cyanosis, a change of skin color due to decreased amounts of oxygenated hemoglobin Blue baby syndrome, cyanosis in babies Purpura, hemorrhagic lesions caused by bleeding underneath the skin Bruise Petechia
See also Blueskin (disambiguation) Blue people (disambiguation)