Sclerotherapy is an injection-based method. Using a fine needle small amounts of an irritating solution is deposited inside the vein. This causes the walls to swell, eventually closing down the vein entirely. The vein is then reabsorbed in a 3-4 weeks. Note that sclerotherapy is only effective on spider vein clusters and very small varicose veins (less than 3 mm).

SKIN RESURFACING LASERS ARE EFFECTIVE ON SPIDER VEINS 

This method isn’t invasive at all, however. As a result it’s become extremely common. Laser therapy uses rapid pulses of light to achieve the same ends as sclerotherapy. Although intense heat is being produced this is primarily limited to the vein walls so there’s very little damage to surrounding tissue. At most the only adverse effects are temporary skin redness and possible blisters. Says Dr. Giraldo, “My staff and I use skin lasers and sclero probably about 12 times every day. Patients love it!”