What are Tread Veins / Spider Veins?
Thread veins are a common problem and occur in about half of adults. These are very fine dilated veins lying in the skin. They come from normal veins in the skin which grow much bigger than their usual size. They often occur near the ankle, over the inside of the knee and outside of the thigh.
Thread veins may occur in the region where a minor injury has caused a bruise. Once this has healed, thread veins stay in its place.
Thread veins are also known as spider veins or dermal flares.
The tendency to grow them is in part an inherited problem. They may run in some families. Thread veins may begin during hormonal surges: at the onset of periods and during pregnancy.