Facial thread veins is a term often used for the little red, or sometimes purple-blue, veins on the face. These are usually found around the nose but can spread up onto the cheeks.
Facial thread veins are usually bright red. Very occasionally, they can be blue or purple and can be enlarged or bulging. However, the vast majority of facial thread veins are bright red, very thin and, when you push on them with a finger, they blanch, filling almost immediately afterwards.
Although they are called ‘thread veins’, they are normally not veins at all. More usually they are dilated capillary networks from your arteries and not your veins (arteries take blood from the heart to the rest of the body and veins return blood to the heart). Because of this, the blood inside them is more oxygenated and therefore brighter red. The blood is often at a higher pressure, which is why they refill so quickly after pressure has been applied to them.