For leg spider veins, sclerotherapy places a small amount of a medical solution directly into the vessel, causing its walls to close. A surface laser can instead deliver controlled light energy through the skin to heat and close very small vessels, and is often considered for facial veins or vessels that are difficult to inject.
The body gradually clears the closed vessel over the following weeks. The most appropriate method depends on the vessel size, colour and location, as well as skin type and whether a larger feeding vein or venous reflux is present.
