"seen in 10% of healthy adults.
> five spider naevi = sign of liver disease.
Face
neck
upper trunk and arms.
Due to failure of the sphincteric muscle surrounding a cutaneous arteriole.
Central red dot is the dilated arteriole
The red "spider legs" are small veins carrying away blood.
If momentary pressure is applied
it is possible to see the emptied veins refilling
from the centre. No other angiomas show this phenomenon."