Sclerotherapy is not a cure for venous disease; it treats specific veins, and new veins can develop over time

https://blogfreely.net/kevalahjuy/when-to-treat-varicose-veins-is-sclerotherapy-the-right-time

Sclerotherapy is not a cure for venous disease; it treats specific veins, and new veins can develop over time, making periodic maintenance sessions common for long-term cosmetic control.