This article is from the Big Folks Health FAQ, by firstname.lastname@example.org (Sharon Curtis) with numerous contributions by others.
Varicose veins are those that bulge out. They are hereditary, but can
be exacerbated by excess pressure, eg high weight, constant standing
(nurses and waitresses are notorious for them) and pregnancy.
They do not go away if you lose weight, although if you do lose weight,
it might (or might not) stop more from forming.
There are surgical and non-surgical ways of getting rid of them.
The most common nonsurgical way involves injecting a saline solution
into the vein. It then closes up (the blood flow goes through other veins).
You then have to wear a bandage around it for six weeks or so, so that it
doesn't pop out again.
Support stockings may help comfort-wise, although they might not
prevent more from forming.