<Tr> <Th_colspan="2"> Classification and external resources </Th> </Tr> <Tr> <Td_colspan="2"> (edit on Wikidata) </Td> </Tr> <P> Hematidrosis, also called blood sweat, is a very rare condition in which a human sweats blood . The term is from Ancient Greek haîma / haímatos (αἷμα / αἵματος), meaning blood, and hīdrṓs (ἱδρώς), meaning sweat . </P> <P> Blood usually oozes from the forehead, nails, umbilicus, and other skin surfaces . In addition, oozing from mucocutaneous surfaces causing nosebleeds, bloodstained tears, and vicarious menstruation are common . The episodes may be preceded by intense headache and abdominal pain and are usually self - limiting . In some conditions, the secreted fluid is more dilute and appears to be blood - tinged, while others may have darker bright red secretions resembling blood . </P>

What is the medical term for sweating blood