Sulfhemoglobinemia is a medical condition caused by an abnormality in hemoglobin, a protein that carries oxygen in the blood. There are few synonyms for sulfhemoglobinemia, but some medical professionals may use the term sulfhemoglobinemia to describe it. Other similar terms that can be used include sulfmethemoglobinemia, sulfohemoglobinemia, and sulfaemoglobinemia. These terms are used interchangeably, referring to the same medical condition. This condition causes discoloration of the skin, which can range from blue to green. Sulfhemoglobinemia is commonly treated by stopping the use of the offending drugs that can cause this condition, such as sulfonamides and acetaminophen.