Erythema toxicum neonatorum Erythema toxicum neonatorum Erythema toxicum neonatorum (also known as erythema toxicum, urticaria neonatorum and toxic erythema of the newborn) is a common rash in neonates. It appears in up to half of newborns carried to term, usually between day 2–5 after birth; it does not occur outside the neonatal period. Erythema toxicum is characterized by blotchy red spots on the skin with overlying white or yellow papules or pustules. These lesions may be few or numerous. The eruption typically resolves within first two weeks of life and frequently individual lesions will appear and disappear within minutes or hours. It is
Skin flora the three types of Archaea were found in one volunteer who claimed not to have bathed or showered for many years. "Staphylococcus" and "Corynebacterium" were among the most common types of bacteria found in the navels of this project’s volunteers and these types of bacteria have been found to be the most common types of bacteria found on the human skin in larger studies of the skin microbiome (of which the Belly Button Biodiversity Project is a part). (In these larger studies it has been found that females generally have more "Staphylococcus" living in their skin microbiomes (usually "Staphylococcus epidermidis")