There are two main medical procedures people use to cure spider veins. Theses procedures are a laser treatment and sclerotherapy. I strongly suggest you research each one of these in detail before considering it. So here is how each one works.
Laser Treatments – High-intensity lasers are used to cauterize leaks in the veins, this procedure works well and is mildly uncomfortable.
Sclerotherapy – This is when you are injected with a saline solution to help clot the blood and dissolve it, this procedure also works and is mildly uncomfortable. For more details visit http://www.veinsweb.com/