A condition where the veins in the body appear to protrude from the skin, or where the blood vessels have collapsed in an area of the body.
These veins are common in older people and people with other health problems.
Varicose vein syndrome can cause pain and difficulty walking.
This is especially serious if you have diabetes, high blood pressure, a heart condition, or a condition that causes blood to flow too fast.
If you or anyone you know has a varicocele, you should see your GP immediately.
They will want to know why the veins have appeared and whether they are due to varicosis.
This can be difficult to diagnose and you may need a scan or X-ray to rule out the cause.