Sclerotherapy effectively treats varicose and spider veins. It's often considered the treatment of choice for small varicose veins.
Sclerotherapy involves injecting a solution directly into the vein. The sclerotherapy solution causes the vein to scar, forcing blood to reroute through healthier veins. The collapsed vein is reabsorbed into local tissue and eventually fades.
After sclerotherapy, treated veins tend to fade within a few weeks, although occasionally it may take a month or more to see the full results. In some instances, several sclerotherapy treatments may be needed.
Why it's done
Sclerotherapy is often done for:
Cosmetic purposes — to improve the appearance of varicose and spider veins
The procedure also can improve related symptoms such as:
If you're pregnant or breast-feeding, doctors recommend waiting to have sclerotherapy done.
Source Credit: https://www.mayoclinic.org/tests-procedures/sclerotherapy/about/pac-20384592